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Portia and Scarlett XO331 Mermaid Corset Lace Beaded Strapless Gown
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Standard: arrives in 7 to 12 days
Express: arrives in 4 to 6 days
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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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Description
About the Dress: Portia and Scarlett XO331
The Portia and Scarlett XO331 is a strapless mermaid gown built for maximum impact. The bodice is covered in beaded lace over a structured corset frame with visible boning channels, and the skirt flows into smooth satin that hugs the hips and thighs before flaring out below the knee into a sweep train. The scoop neckline frames the décolleté cleanly, and the back features a full lace-up corset closure with the majority of the back skin exposed — a dramatic open-back finish. This gown is available in Champagne Beige, Red, Blue, Ivory/Gold, and Yellow.
Fit & Silhouette
The XO331 is a true mermaid: it fits close through the bust, waist, hips, and thighs, then flares below the knee into a modest train. The boned corset bodice gives strong structure and holds the scoop neckline in place without straps. Because the fit through the lower body is snug, most customers find that sizing up one size from their usual gives the best balance of comfort and silhouette. The lace-up corset back provides several inches of adjustability, which is useful if you are between sizes or expecting minor fluctuations before the event. This is a form-fitting gown — it rewards precise measurements over guesswork.
Fabric & Detail
The bodice fabric is beaded lace layered over a structured interior with boning channels running the full length of the corset. The boning keeps the shape of the scoop neckline sharp and supports the torso without needing a separate strapless bra. The skirt transitions into smooth satin that catches light cleanly at the hip and thigh, then opens into the flared train below the knee. The back lacing is finished with clean ribbon ties, and the exposed back is a deliberate design choice — the lace-up closure is both functional and a statement on its own.
Key Features
• Strapless scoop neckline with visible boning channels
• Beaded lace bodice over structured corset interior
• Smooth satin mermaid skirt with sweep train
• Full lace-up corset back with open-back exposure
• Sleeveless, form-fitting through hips and thighs
• Available in Champagne Beige, Red, Blue, Ivory/Gold, and Yellow
• Authorized Portia and Scarlett retailer — every dress inspected before shipping
Style & Occasion
The Portia and Scarlett XO331 is built for prom and formal evening events where a bold silhouette is the whole point. The open corset back and body-skimming mermaid cut make it a strong choice for formal dances, evening galas, and any event where you want the dress to do the talking. Style it with strappy heeled sandals or pointed-toe pumps to keep the line clean. For jewelry, the open neckline and back work best with minimal or statement earrings rather than a necklace. The champagne beige and ivory/gold colorways read soft and formal; red reads bold and high-impact. If you are coordinating with a group or damas, the range of available colors makes it straightforward to dress the full court in complementary shades.
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.
Return policy -
Found this dress cheaper? Send us the link and we'll match the price.
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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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Frequently Asked Questions
Yes — Marlas Fashions does accept returns on the Portia and Scarlett XO331, so you can try it on at home. The policy works like this: you can return the dress for store credit that never expires, exchange it for a different size or style, or request a refund minus a 30% restocking fee. The restocking fee exists because formal gowns are inspected and repackaged individually, but the store credit and exchange options give you full flexibility without that deduction.
The practical advice for trying it on at home is to keep all original packaging, tags, and garment bags intact until you are certain you are keeping the dress. Do not have it steamed, altered, or worn to an event before deciding — once alterations are made the return window closes. Try it on in clean socks or barefoot on a carpeted surface to avoid any marks on the hem.
Because the XO331 has a lace-up corset back, you will need a second person to help you lace it properly and get a true sense of the fit. A loosely laced corset back will make the dress look bigger than it is, so ask a friend or family member to help tighten the lacing evenly from the top down before you evaluate the fit. Every XO331 order is hand-inspected before shipping so the fit and finish arrive flawless. If you are between sizes on the XO331, send our team your measurements before ordering and we will advise. Popular colorways of the XO331 sell out quickly each season, so early orders get first pick. Our stylists fit the XO331 in the boutique every week and know exactly how it runs. Every XO331 order is hand-inspected before shipping so the fit and finish arrive flawless. If you are between sizes on the XO331, send our team your measurements before ordering and we will advise.
Marlas Fashions ships the Portia and Scarlett XO331 from warehouses in Los Angeles and New York, with a separate Canadian fulfillment warehouse in Toronto. Standard delivery takes 7 to 12 business days from the time your order is confirmed. Rush options are available if your event date is coming up quickly — reach out before placing your order so the team can confirm whether rush fulfillment is possible for the XO331 in your color and size.
Shipping is fully tracked for every destination. For US and Canadian customers there are no duties or surprise fees at delivery — what you see at checkout is what you pay. International orders outside North America ship worldwide with tracking included, though local import duties may apply depending on your country.
If you need the dress by a specific date, the safest approach is to order as early as possible and let the team know your event date at checkout. The XO331 is a structured mermaid gown that may also benefit from a local fitting or minor hem adjustment after arrival, so building in a week or two of buffer beyond the delivery window is worth planning for. For any questions about lead times, in-stock status in a particular color, or rush arrangements, you can reach the Marlas Fashions concierge directly by text at +1 416-536-2956 or WhatsApp at +1 213-868-3131 — the team responds quickly and can check real-time availability for you. Every XO331 order is hand-inspected before shipping so the fit and finish arrive flawless. If you are between sizes on the XO331, send our team your measurements before ordering and we will advise. Popular colorways of the XO331 sell out quickly each season, so early orders get first pick. Our stylists fit the XO331 in the boutique every week and know exactly how it runs. Every XO331 order is hand-inspected before shipping so the fit and finish arrive flawless.
The XO331 stands out because it combines three design elements that are not always found together in one gown: a beaded lace bodice, a fully boned corset interior, and an open lace-up back with dramatic skin exposure. A lot of strapless mermaid gowns rely on boning alone or on a simple zipper back. The XO331 uses a full lace-up corset closure, which means the back is both a structural feature and a visual statement — when you turn around, the open corset back is as much a design moment as the front scoop neckline.
The transition from the beaded lace on the bodice to the smooth satin skirt is also a deliberate contrast. The top half catches light through the beading and lace texture; the lower half is clean and smooth, which emphasizes the mermaid flare at the hem. Many dresses either go fully embellished or fully plain — the XO331 uses both zones intentionally. That contrast is what gives it a tailored, formal look rather than a heavily decorated one throughout.
The XO331 has a full lace-up corset back with ribbon ties that run from the upper back down to the top of the skirt. When properly laced from the top down and tightened evenly, the corset closure can adjust the waist and torso fit by approximately two to three inches in either direction. This makes it one of the more forgiving closures available on a fitted formal gown.
To get the best result, have someone else do the lacing for you. Start at the top eyelet and work downward, pulling each section of lacing snug before moving to the next. Finish with a bow or knot at the bottom and tuck any excess ribbon inside the skirt waistband. The open-back exposure is part of the design — the lacing is meant to be visible — so a neat, even lace pattern makes a better impression than a loose or uneven one. If you have the dress altered at a tailor, they can also adjust the corset panel itself for a more custom fit.
Yes. The Portia and Scarlett XO331 is available in five colorways: Champagne Beige, Red, Blue, Ivory/Gold, and Yellow. That range makes it practical for dressing a full court or damas group, either in matching colors or in complementary shades. For prom, a common approach is to put the lead in Red or Champagne Beige and dress the court in a coordinating neutral or complementary color.
If you are ordering for a group, the most important step is to place all orders at the same time or as close together as possible, since stock levels in any given color and size can shift. Contact the Marlas Fashions team in advance to confirm availability across all the sizes and colors your group needs before placing individual orders. They can also advise on which colorways photograph best together if group photos are a priority. Every XO331 order is hand-inspected before shipping so the fit and finish arrive flawless. If you are between sizes on the XO331, send our team your measurements before ordering and we will advise.
The XO331 fits true to the Portia and Scarlett size chart based on bust, waist, and hip measurements. Because the mermaid skirt is fitted through the hips and thighs, most customers find that sizing up one size from their usual dress size gives a more comfortable fit — especially through the lower body. The boned corset bodice can be tightened at the back to compensate at the waist, so going up in the hip measurement is the safer call.
Take your measurements while wearing the undergarments you plan to wear with the dress. The bust, natural waist, and fullest part of the hips are the three numbers that matter most. If your measurements fall between sizes, size up rather than down — the corset lace-up can reduce fit at the back, but it cannot add room if the hip or thigh panel is too tight. Every XO331 order is hand-inspected before shipping so the fit and finish arrive flawless. If you are between sizes on the XO331, send our team your measurements before ordering and we will advise.
The XO331 has a fully boned corset bodice, which means built-in support is already structured into the dress. Most customers find they do not need a separate bra. The boning holds the scoop neckline firmly in place and provides lift and shaping on its own.
If you prefer additional coverage or support, a strapless adhesive bra or silicone bra can be used underneath without affecting the fit. Avoid any bra with visible straps, as the strapless scoop neckline is designed to be clean and uninterrupted. For the lower body, seamless underwear or shapewear shorts work best under the fitted satin skirt to keep the silhouette smooth through the thigh area. Every XO331 order is hand-inspected before shipping so the fit and finish arrive flawless. If you are between sizes on the XO331, send our team your measurements before ordering and we will advise. Popular colorways of the XO331 sell out quickly each season, so early orders get first pick. Our stylists fit the XO331 in the boutique every week and know exactly how it runs.
Yes, the XO331 can be hemmed by a local tailor. Because the skirt transitions from smooth satin into a sweep train, hemming is a straightforward job for any experienced formal-wear tailor. For petite heights, a hem adjustment of two to four inches is typical. Bring the shoes you plan to wear to the fitting so the tailor sets the correct finished length.
Note that the flared mermaid hem and train shape should be preserved during hemming — ask the tailor to maintain the flare angle rather than cutting the hem straight across. Most formal-wear tailors are familiar with this type of adjustment. Plan for one to two fittings to get the hem length exactly right, and schedule the alterations appointment as soon as the dress arrives so you have enough time before your event. Every XO331 order is hand-inspected before shipping so the fit and finish arrive flawless. If you are between sizes on the XO331, send our team your measurements before ordering and we will advise.