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Portia and Scarlett XO347 Strapless Satin Mermaid Trumpet Gown
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Standard: arrives in 7 to 12 days
Express: arrives in 4 to 6 days
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Found it for less on a Canadian or US website? We'll match the price and take another $10 off, as long as your colour and size are available.
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Ships from LA, Chicago, New York & Toronto in our pink Marla's box. No duties. Free over $250. Standard 6–9 business days.
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Stick-on bra
Invisible support for strapless & backless
$20 CAD
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Double-sided tape
Keeps necklines in place all night
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Description
About the Dress: Portia and Scarlett XO347
The Portia and Scarlett XO347 is a strapless satin mermaid trumpet gown built around a clean, high-impact silhouette. The bodice is structured and smooth, with a sweetheart neckline accented by a contrasting bow appliqué at center bust. The skirt flares dramatically below the knee into a trumpet hem with a slight sweep train at the floor. Available in Black/Pink and Black/White — both are two-tone combinations that let the bow and skirt flare read as a deliberate design detail rather than just a color choice. No beading, no sequins — satin is the whole story here.
Fit & Silhouette
The XO347 fits close through the bust, waist, and hips, then opens into a full trumpet flare below the knee. That dramatic flare is what makes the silhouette work — it creates a strong hourglass line without any embellishment to carry the look. The structured bodice holds its shape through internal boning, so the dress stays exactly where it should all night. This is a mermaid trumpet cut, meaning there is no slit — the skirt flares all the way around for a clean, sweeping profile. Sizing follows Portia and Scarlett's standard chart; the boned bodice has some give at the top but not a lot of stretch at the hip, so measuring carefully before ordering matters here.
Fabric & Detail
The Portia and Scarlett XO347 is made in satin throughout — a smooth, medium-weight fabric that drapes cleanly over the trumpet skirt and holds the structure of the bodice without wrinkling easily. The contrasting bow appliqué at the center bust is the only surface detail on the dress; everything else is clean satin. The back is fully open with a center zipper running down the spine — the whole upper and mid back is bare, which keeps the back as much of a focal point as the front. A slight sweep train finishes the hem at the floor.
Key Features
- Strapless sweetheart neckline with contrasting bow appliqué at center bust
- Mermaid trumpet silhouette — fitted through hips, dramatic flare below the knee, no slit
- Fully open back with center zipper closure
- Internal boning for structured, strapless support all night
- Slight sweep train at hem
- Satin construction throughout — no beading or sequins
- Available in Black/Pink and Black/White
Style & Occasion
The Portia and Scarlett XO347 is a strong choice for prom, formal dances, black-tie events, galas, and evening occasions where the dress needs to make a statement on its own. The clean satin silhouette photographs well under both natural and event lighting, and the two-tone colorways — Black/Pink and Black/White — read as bold without relying on embellishment. For shoes, a pointed-toe stiletto or strappy heeled sandal in a matching or neutral tone keeps the line unbroken. Minimal jewelry works best here: a simple ear cuff or small drop earring lets the bow and open back carry the attention. The fully open back means a standard bra won't work — built-in cups handle support. If you are ordering for a group or prom court, both colorways coordinate easily across a party without matching exactly.
Size & fit
- Fitted. Bust, waist and hips all matter. Go by your largest measurement.
- Between sizes? Text a stylist and we'll help you choose.
Shipping
- Arrives in 7–12 business days, or 4–6 with Express (+$35).
- Free shipping over $250 to Canada and the USA.
- Text updates as your order ships.
Full shipping details
Your Dress — Delivered in Days, Not Weeks.
We know timing matters — especially for prom, weddings, quinceañeras, and special events.
- Receive your dress within 7–12 business days, depending on designer availability.
- You’ll receive text updates as your order moves from processing to shipping.
- Once shipped, delivery typically takes 2–5 business days within North America.
Need it sooner?
We offer rush options where you can receive your dress within 4–6 business days. Text us at +1 416-536-2956 before ordering and we’ll confirm the fastest possible delivery date.
We are an authorized retailer of top designers, which means your dress ships brand new and directly from the designer or our showroom — never used, never rented.
Have an event date? Add it in your order notes so we can prioritize accordingly.
We proudly ship across Canada, the United States, and Internationally, with in-store pickup available at our Toronto showroom.
Returns
- Tell us within 5 days of delivery.
- 100% store credit, a one-time exchange, or a refund (30% restocking fee).
- Online purchases only; in-store purchases are final.
Full return policy
WE ACCEPT RETURNS!
For Online Purchases Only. All in-store purchases are FINAL.
We hope you LOVE your dress — but if you're not completely satisfied with your online purchase, you may request:
- 100% Store Credit (no expiration).
- A one-time exchange, OR
- A return with a 30% restocking fee, OR
You must notify us of a return within 5 days of delivery (including weekends and holidays — we are open 7 days a week).
We have no control and accept no responsibility for the sizing selected. Please carefully review the size chart before ordering. If you need assistance with sizing, we’re happy to help — text us at +1 416-536-2956.
ORDER CHANGES & CANCELLATIONS
Once your order is placed, you have 5 hours to request a change to the color, size, or style.
If an item becomes unavailable, we will offer alternatives or provide the option of a full refund for that item.
Please see our Returns & Exchanges page for full details.
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Free standard shipping on orders over $250 to the US and Canada. Under $250, shipping is shown at checkout.
Shipping details -
US orders ship from our warehouses in Los Angeles, Chicago and New York. Canadian orders ship from Toronto. No duties to pay at the door.
Shipping details -
Exchange, store credit or refund. Dresses tagged Final sale can't be returned.
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Why buy from Marlas
Authorized retailerEvery dress authentic, direct from the designer
Toronto flagship10,000 sq ft showroom, 100,000+ clients styled
15,700+ online ordersShipped to 59 countries
Real stylistsText, WhatsApp or chat. Replies in about 10 min
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Portia and Scarlett XO347 Strapless Satin Mermaid Trumpet Gown with Train
Sale price $589 CAD
Need help?
Frequently Asked Questions
This is the most important question to ask about any mermaid trumpet gown, and it's worth being direct about it. The XO347 is fitted through the hips by design — that close fit is what creates the silhouette. Below the knee, the trumpet flare opens up significantly, which is what allows movement. You can walk normally, climb stairs, and dance without the locked-leg feeling you sometimes get from a true pencil-tight mermaid with no flare. That said, your stride will be shorter than in an a-line or ballgown, and you will feel the fit through the hip — that's just the nature of this silhouette.
The internal boning in the bodice is what makes strapless dancing actually workable. A structured boned bodice doesn't shift or sag the way a softly constructed strapless dress can. As long as the bodice fits correctly — meaning it is snug but not digging in — it stays put through a full evening of movement. If the bodice is even a half-size too large, it will move around when you dance; if it is too tight at the rib, it will feel restrictive sitting down. Getting the fit right here matters more than it would in a dress with straps.
Practical tips: wear the dress for at least twenty minutes before your event, including sitting down, standing back up, and taking a few stairs, so you know exactly how it moves on your body. Break in whatever shoes you plan to wear at the same time. Sitting in a mermaid trumpet gown requires a slight hip-shift to the side rather than a straight drop into the chair — it becomes natural quickly but is worth practicing once.
The sweep train at the hem adds floor length without being a full chapel train, so it is unlikely to get stepped on in a crowded venue the way a longer train might. Most wearers find they forget about it after the first hour. If you are dancing a lot, a slight bustle or tucking the train is not really possible with this construction — the hem is a fixed part of the skirt. On a standard dance floor it moves with you fine; on a very tight, crowded floor you will want to be a bit more aware of it.
Bottom line: for a prom or gala evening with a mix of sitting, posing, and dancing, the XO347 is a realistic choice. The trumpet flare gives you the movement room you need. Just make sure the bodice fit is exact.
The Portia and Scarlett XO347 was designed as a formal gown, and it reads that way in person. The clean satin construction, the dramatic trumpet flare, the sweep train, and the fully open back all signal a dress built for high-stakes occasions. Here is how it maps to specific events.
Prom: this is an obvious fit. The bold silhouette and two-tone colorways are exactly what works for a prom entrance. Both Black/Pink and Black/White photograph well under event lighting — the contrasting bow reads clearly in photos and on stage.
Black-tie and gala: yes, and genuinely so. Black-tie calls for floor-length formal gowns, and the XO347 delivers that with a silhouette that is polished rather than overtly party-forward. The satin is an appropriate fabric for this dress code, and the lack of heavy beading or sequins actually works in its favor at a very formal event — it is a gown that looks refined rather than flashy. The open back keeps it visually interesting without tipping into inappropriate territory for a formal room.
Formal dances and evening events: any formal occasion where a floor-length gown is the expected dress code is a natural home for this style. Military balls, formal dinner events, and awards evenings all work.
Wedding guest: this one requires thought. The fully open back is the variable — at a conservative or religious wedding, a fully bare back may be considered too revealing for a guest. At a modern venue wedding or a cocktail-reception-style celebration, it would likely be fine. If you are attending a wedding where modest dress is expected or requested, this is not the right choice. If the event is a lively, fashion-forward wedding, it works beautifully.
What it is not suited for: casual events, outdoor festivals, or anything with a semi-formal or cocktail dress code. The sweep train and mermaid silhouette require a proper venue floor and make sense only when the occasion calls for a full formal gown.
If you are genuinely unsure whether this dress fits your specific event's dress code, our team is happy to help you think it through. Reach out by text to +1 416-536-2956 or WhatsApp at +1 213-868-3131 — we can look at invitation wording or event details with you.
Both colorways are two-tone combinations: the base of the gown is black satin, and the contrasting detail — primarily the bow at the center bust and the skirt flare — reads as either pink or white depending on the colorway. In person, Black/Pink has a warm, energetic feel; it is vibrant without being neon. Black/White is sharper and more graphic — very clean and high-contrast. Under event lighting, both read boldly, but Black/White tends to have a slightly more formal edge while Black/Pink skews a little younger and more playful.
For photography, Black/White produces very clear contrast in most lighting conditions. Flash photography at prom or gala events can sometimes wash out pale pink tones slightly, so if professional photos or a strong visual presence in group shots matters to you, Black/White is reliable. Black/Pink photographs beautifully in natural or warm-toned lighting — sunset outdoor portraits will look particularly good in this colorway.
Choice ultimately comes down to your personal style and the overall color story of your group or event. If you are coordinating with a date or prom court, consider which colorway picks up accent colors in their attire. Both are available in the same size run, and there is no difference in construction or fit between them.
Satin requires more care than jersey or chiffon, but it is manageable if you follow a few straightforward rules. For cleaning after wearing, professional dry cleaning is the right call — satin can watermark if spot-cleaned with water, especially on a structured gown with internal boning. Do not attempt to hand-wash or machine-wash this dress.
For storage, hang the gown on a wide, padded hanger rather than a thin wire hanger, which can distort the bodice shape over time. Keep it in a breathable garment bag — not plastic, which traps moisture. Store it away from direct light; prolonged light exposure can alter the color of satin over months.
For travel, the safest approach is to lay the gown flat in a large garment bag or box rather than folding it tightly. If you must fold it, fold along the seam lines rather than across them, and place acid-free tissue paper in the folds to prevent creasing. A steamer is the best tool for removing travel wrinkles from satin; hold the steamer a few inches away and let the steam relax the fabric rather than pressing directly. A hot iron directly on satin can leave a permanent shine mark — if you must iron, use a pressing cloth and low heat on the reverse side.
The silhouette does most of the work here, so accessories should support the gown rather than compete with it. For shoes, a pointed-toe stiletto heel in black is the most versatile choice — it extends the leg line and keeps the profile clean. A strappy heeled sandal in black, gold, or silver works equally well and allows a peek of skin that pairs naturally with the open back. Platform heels work if you prefer added height without the steep incline; just make sure the heel height accounts for your hem length, since the sweep train is cut for a standard heel range.
For jewelry, less is genuinely more with this dress. The open back and the bow appliqué are the visual focus points, so heavy necklaces compete with both. Small drop earrings, a simple ear cuff, or delicate stud earrings are all strong choices. If you want to wear a bracelet or cuff, keep it minimal — one piece, one wrist. A small evening clutch in black, white, or a metallic tone finishes the look cleanly. For Black/Pink, a rose gold or warm-toned clutch adds cohesion; for Black/White, a silver or white clutch reads sharp and intentional.
Portia and Scarlett XO347 ships within 7 to 12 business days from the order date under standard shipping. Rush processing is available at checkout if your event date is tight — select the rush option and your order moves to the front of the fulfillment queue. US and international orders ship from our Los Angeles and New York warehouses. Canadian orders ship from our Toronto location, and there are no import duties on shipments to the US or Canada.
Every shipment includes tracking, so you can follow the package from dispatch to delivery. If you have a firm event date, we recommend ordering at least three weeks in advance under standard shipping to give yourself buffer time for any fit adjustments after the dress arrives. If your date is closer than that, use the rush option and reach out to confirm your timeline. Every XO347 order is hand-inspected before shipping so the fit and finish arrive flawless. If you are between sizes on the XO347, send our team your measurements before ordering and we will advise.
Marlas Fashions accepts returns on unworn, unaltered gowns with original tags attached. You have three return options: store credit that never expires, a direct exchange for a different size or colorway, or a refund minus a 30% restocking fee. The restocking fee reflects the handling and inspection every returned gown goes through before it can be offered again.
The most practical approach if you are unsure about fit is to order your most likely size, try the dress on at home as soon as it arrives — still in the house, with the tags on — and initiate a size exchange if needed before the event date. This is a much more reliable process than ordering two sizes and returning one. If you are between sizes in the bodice, sizing up and having the top taken in by a local seamstress is usually a cleaner result than a bodice that is too tight.
For exchanges, turnaround depends on stock availability in the replacement size. Contact us as soon as you know you need a different size so we can confirm availability immediately.
The fully open back means a standard bra is not an option — the back exposure extends across the full upper and mid back, so nothing will be hidden. The structured boned bodice has built-in cup support, which is designed to carry the full job of keeping the dress in place without external support. The cups and boning work together, so if the bodice fits correctly — snug but not constricting — you do not need additional undergarments at the bust.
For coverage at the lower body, seamless or low-back underpants in a color matching your skin tone are the standard approach. Avoid any undergarment with a visible waistband that will sit above the dress line at the back.
The center back zipper runs from the base of the open back section down through the skirt. It does not adjust the fit of the bodice — the bodice fit is determined purely by your measurements against the size chart. The zipper closes the skirt, not the top. If you have significant size differences between your upper and lower measurements, mention that when you reach out to us so we can advise on which measurement to prioritize when selecting a size.