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Portia and Scarlett XO307 Strapless Satin Ballgown
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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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Style it with
Stick-on bra
Invisible support for strapless & backless
$20 CAD
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Double-sided tape
Keeps necklines in place all night
$20 CAD
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Garment bag
Our signature pink bag. Arrives clean and protected
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Description
About the Dress: Portia and Scarlett XO307
The Portia and Scarlett XO307 is a strapless ballgown built around a structured satin bodice and a voluminous tulle skirt. A large satin bow sits at the hip and waist junction, giving the dress its signature focal point. It is available in Black, Pink, and Lilac, and the lace-up corset back is visible in the Lilac back-view image.
Fit & Silhouette
The XO307 is a true ballgown: the fitted satin bodice is structured to hold its shape on its own, and the skirt opens into a full, floor-length volume below the waist. The strapless neckline runs in a smooth, gently curved horizontal band across the bust. Because the corset back laces up, the fit through the bodice is adjustable — you can tighten or loosen the lacing to dial in your exact fit on the day of your event. The bodice runs true to size; Portia and Scarlett recommend sizing to your largest measurement (bust or waist) and using the corset lacing to refine the fit.
Fabric & Detail
The bodice is structured satin with internal boning that keeps the strapless neckline secure without straps or a zip. The skirt is tulle layered to create fullness and movement. Both fabrics are clean and unembellished — no beading, no sequin, no appliqués — so the shape and the bow do all the work. The satin bow at the hip is large enough to read clearly in photos and in person, making it the defining detail of the XO307.
Key Features
- Strapless scoop-neck with smooth curved edge
- Structured satin bodice with internal boning
- Lace-up corset back for an adjustable, custom fit
- Voluminous floor-length tulle ballgown skirt
- Large satin bow accent at the hip and waist
- Available in Black, Pink, and Lilac
- Clean, unembellished finish — no beading or sequin
Style & Occasion
The Portia and Scarlett XO307 is the kind of ballgown that stands out because of its shape rather than its sparkle. If you want a dramatic silhouette without heavy embellishment, this is the dress. It works especially well for prom, formal dances, Sweet 16 celebrations, and debut events. The clean satin and tulle palette in Black, Pink, and Lilac means it photographs well in any lighting. For footwear, a strappy heel or simple pump keeps the focus on the skirt. Accessories can stay minimal — a small clutch and simple earrings are enough. If you are dressing a court or damas group, the clean, unbeaded surface of the XO307 makes it easy to coordinate with bridesmaid-style separates or simpler gowns in matching colors without competing embellishment.
Size & fit
- Flowy. Bust and waist matter most; the skirt has room for hips.
- 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 -
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Why buy from Marlas
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Toronto flagship10,000 sq ft showroom, 100,000+ clients styled
15,700+ online ordersShipped to 59 countries
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Portia and Scarlett XO307 Strapless Satin Ballgown with Corset Back
Sale price $869 CAD
Need help?
Frequently Asked Questions
The XO307 is a structured strapless ballgown, and that silhouette is genuinely one of the most versatile shapes in formal wear — but it works differently depending on your proportions, so here is a straightforward breakdown.
If you have a smaller bust, the internal boning in the satin bodice does a lot of the holding work that your bust alone does not need to provide. The structured satin holds the neckline up even without straps, so the bodice stays in place through the night. The corset lacing at the back also lets you close the bodice tightly enough to create the illusion of a more defined waist even on a straighter frame.
If you have a fuller bust or a wider rib cage, the corset lacing is your best friend here. Because the bodice does not have a fixed zip, you can lace it to accommodate your exact measurements rather than having to size up the entire gown and take it in. Size to your bust measurement first, and use the lacing to bring in the waist as needed.
If you carry weight in your hips, the ballgown skirt works in your favor. The tulle skirt opens from the hip downward, so it naturally flows over the hips and thighs without clinging. The large satin bow sits right at the hip and waist junction, which draws the eye to the narrowest point of the bodice before the skirt opens out. That placement tends to elongate the torso visually.
If you are petite, the floor-length tulle skirt is voluminous, so a heel is strongly recommended to avoid being overwhelmed by the fabric. A skilled seamstress can also hem the hem and underskirt layers to your exact height — the tulle layers hem easily and the change is affordable at most alteration shops.
If you are tall, the full-length skirt hits the floor beautifully at standard gown length, and the proportions of the bow and bodice work well on a longer torso.
The one honest caveat: this is a full ballgown. If you prefer a silhouette that skims close to the body through the hips and thighs, the XO307 is not that dress. But if you want volume, presence, and a shape that photographs dramatically from every angle, the XO307 delivers.
The XO307 is built for prom, formal dances, Sweet 16 parties, and debut events. Those are the four events it was designed for, and it is genuinely excellent at all of them.
For prom: this is a true prom ballgown. The combination of a structured strapless bodice, a voluminous tulle skirt, and a statement bow is exactly what a prom ballgown is supposed to be. If you want to walk into prom and have the silhouette speak for itself, this dress does that without needing heavy beading or sparkle. The Black, Pink, and Lilac colorways all read as prom-appropriate.
For Sweet 16 and debut: the clean, unembellished satin and tulle is a great fit for these celebrations. The XO307 is formal enough to feel like a milestone event but does not cross into heavy pageant or quinceanera territory. It is a refined ballgown rather than an over-the-top statement piece.
For formal dances and black-tie adjacent events: if your school has a formal dinner-dance, a military ball, or a similar structured event, the XO307 works here too. The silhouette is unmistakably formal.
Where it would not be the best fit: the XO307 is styled as a prom ballgown, which means it is not the natural choice for a wedding guest, a mother of the bride, or a black-tie gala where guests typically lean toward sleeker evening gowns. It is also not the right fit for a cocktail party or semi-formal event where a shorter dress is the norm. The volume of the tulle skirt means it is not a practical choice for a venue with narrow aisles, small dance floors, or standing-room-only spaces.
If you are unsure whether this dress fits the dress code for your specific event, our team is happy to help. Text us at +1 416-536-2956 or reach us on WhatsApp at +1 213-868-3131 and we will give you a straight answer.
Portia and Scarlett XO307 ships in 7 to 12 business days under standard shipping. If your event date is soon, rush shipping options are available at checkout — select the rush option that fits your timeline and we will prioritize your order accordingly.
We ship from warehouses in Los Angeles and New York. Canadian customers are fulfilled from our Toronto warehouse, which means no customs duties or import fees for Canadian orders. We also ship internationally with full tracking on every order, so you can follow your dress from the warehouse to your door.
If you are ordering close to your event date and want to confirm a specific delivery window before you place your order, contact our team directly. We can tell you exactly where your order would ship from and whether the timeline works for your date. Every XO307 order is hand-inspected before shipping so the fit and finish arrive flawless. If you are between sizes on the XO307, send our team your measurements before ordering and we will advise.
Yes — you can order the XO307, try it on at home, and decide whether to keep it. Our return policy gives you genuine flexibility.
If the dress does not work for you, you can return it for store credit that never expires, exchange it for a different size or style, or return it for a refund minus a 30% restocking fee. The restocking fee reflects the handling cost on formal gowns, but store credit and exchanges are straightforward with no deduction.
To be eligible for return, the dress needs to be in the same condition you received it — unworn, unaltered, with tags attached. Gowns that have been altered or worn to an event cannot be returned.
If you are between sizes or unsure how the corset lacing will fit your measurements, ordering and trying on at home is genuinely the right approach for this style. The lace-up back means you have a real range of fit adjustment, but trying it on before your event gives you time to arrange any minor alterations if needed.
Most strapless ballgowns in this category rely on beading, sequins, or embroidery to create visual interest. The XO307 does the opposite — it is completely clean and unembellished, so the entire visual effect comes from the silhouette and the proportions of the satin bow.
The structured satin bodice is noticeably rigid compared to lighter satin bodices on similarly priced gowns. That rigidity comes from the internal boning, and it makes a practical difference: the strapless neckline stays in place through dancing without the need for fashion tape or constant adjustment. The corset lacing at the back is another practical upgrade — it gives you a custom fit adjustment that a zip back simply cannot offer.
The satin bow at the hip is also a differentiator. It is large enough to be a genuine design statement, not a small accent. Combined with a clean, unbeaded surface, it gives the XO307 a minimalist-but-dramatic look that is harder to find in this silhouette category.
The back of the XO307 has a full lace-up corset closure — the back panel is visible in the Lilac back-view image. Satin lacing threads through a column of eyelets and ties at the waist, allowing you to open or close the bodice across a range of several inches.
In practical terms, this means you can order the dress to fit your largest measurement — typically your bust or your high waist — and then lace the back tighter to fit your true waist measurement. It also means the dress can accommodate minor weight changes between ordering and your event without requiring a structural alteration.
For the best result, have someone lace you in rather than trying to close it yourself. Start from the top eyelet and work down, distributing the tension evenly before tying off at the waist. The lacing should feel snug and supportive without restricting breathing. If the gap at the back is larger than about three inches when laced to your fit, the dress may be a size too large and a seamstress can take in the side seams for a cleaner finish.
The XO307 runs consistent with Portia and Scarlett's standard sizing, which generally tracks close to US standard sizing for formal gowns. The corset lacing gives you adjustment room, but you still want to start with the right base size.
Measure your bust at the fullest point, your natural waist (the narrowest point, typically an inch or two above the navel), and your hips at the fullest point. Compare all three measurements to the Portia and Scarlett size chart and size to whichever measurement falls into the largest size bracket. For the XO307 specifically, bust and waist are the most critical measurements because the skirt is a full ballgown and does not fit through the hips the way a fitted gown would.
If you are between sizes, size up and use the corset lacing to bring the bodice in. Sizing down and hoping the lacing will allow enough stretch is not reliable on a structured satin bodice.
Because the XO307 has internal boning in the bodice, most wearers do not need a separate strapless bra. The boning is designed to provide the support that the bra would otherwise supply, and adding a bra underneath a boned bodice can create uncomfortable pressure or visible lines through the satin.
The best approach for most body types is to go bra-free and rely on the boning. If you prefer additional coverage or security, a low-cut adhesive bra or silicone bra cups can work under the satin without adding bulk. Avoid underwire strapless bras with thick cups under this style — they tend to push up against the lower edge of the boning and create an awkward ridge.
For the skirt, a simple slip or Spanx shorts in a neutral color work well under the tulle layers if you want a smooth finish, but the tulle volume means undergarment lines are generally not visible from the outside.