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Mac Duggal 26266 One-Shoulder Jersey Mermaid Gown
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Standard: arrives in 7 to 12 days
Express: arrives in 4 to 6 days
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Description
About the Dress: Mac Duggal 26266
Mac Duggal 26266 is a long fitted mermaid gown built for maximum impact. The bodice is contoured through the bust, waist, and hips, then the skirt flares below the knee in a classic mermaid shape that ends in a floor-length sweep train. The one-shoulder neckline keeps the look clean and architectural — one side structured, one side bare — while the open back drops down to the waist for a dramatic rear view. This is a sleek, sculpted gown designed to move beautifully and photograph even better.
Fit & Silhouette
Mac Duggal 26266 fits close to the body from the bust down through the hips, then releases into the mermaid flare below the knee. The silhouette is body-conscious without being restrictive — the jersey fabric has enough give to allow natural movement while still holding the contoured shape. The sweep train adds length and flow at the back without requiring you to carry it. This gown is available in sizes 0–12 and fits true to size. If you are between sizes, sizing up one is the standard recommendation to allow for comfortable movement through the hips.
Fabric & Detail
Mac Duggal 26266 is made in jersey — a smooth, fluid fabric that drapes against the body with real movement. Jersey does not cling harshly; it moves as you move, which is what gives this gown its fluid, almost liquid quality in photos and in person. The surface is clean and unembellished, which puts all the focus on the silhouette and the open-back construction. The sweep train is cut as part of the skirt hem and requires no special handling.
Key Features
- One-shoulder neckline — structured on one side, fully bare on the other
- Fitted mermaid silhouette — contoured through the bust, waist, and hips, flaring below the knee
- Open back — drops to the waist for a dramatic rear profile
- Sweep train — floor-length hem with a slight trailing length at the back
- Jersey fabric — smooth, fluid, and forgiving with natural stretch
- Sizes 0–12
- No front slit
Style & Occasion
Mac Duggal 26266 is a strong choice for prom, formal events, galas, and evening occasions where a sleek, body-conscious gown makes a statement. The powder blue colorway photographs with a cool, luminous quality — lighter and airier in natural light, more saturated under indoor event lighting. The clean unembellished surface means accessories do the talking: a simple metallic strappy heel and minimal jewelry let the silhouette stay center stage. If you are dressing a group or a court, this gown pairs naturally with other Mac Duggal styles in coordinating neutrals or matching powder blue. Marlas Fashions is an authorized Mac Duggal retailer and every dress is inspected before it ships.
Size & fit
- Fitted (mermaid). Bust, waist and hips all matter. Go by your largest measurement.
- Length: Long
- Neckline: One-Shoulder
- Details: Open Back, Train
- 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.
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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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Mac Duggal 26266 One-Shoulder Jersey Mermaid Gown with Sweep Train
Sale price $298
Regular price$596
Need help?
Frequently Asked Questions
Mac Duggal 26266 sits in a specific category of one-shoulder mermaid gown where the construction is very clean — no embellishment, no cutouts beyond the open back, and no front slit. That combination is less common than you might think. Mac Duggal 26266 does neither. The jersey fabric does the work entirely through drape and movement, and the silhouette reads as sculptural rather than decorated. The open back is the second differentiator. It drops to the waist and remains fully open — not partially covered by crossing straps, not softened by illusion mesh. Combined with the one-shoulder front, the gown creates an asymmetric exposure that feels intentional and architectural rather than maximally revealing. The front reads as structured and sleek; the back reads as dramatically open. That contrast is what gives this particular gown its visual tension. The sweep train is also positioned as a detail that adds drama at the rear without requiring a full formal train. You get the floor-length visual sweep in motion — which photographs exceptionally well — without the logistics of a cathedral-length train at an event where you are moving freely. For occasions like prom, galas, and formal evening events, this gown works precisely because it does not compete with itself. There is no embellishment to distract from the silhouette, and there is no surface treatment that dates the dress to a particular trend cycle.
Yes — ordering to try on at home is completely reasonable, and Marlas Fashions has a return and exchange policy built around exactly that situation. If Mac Duggal 26266 arrives and the fit or color is not right, you have three options: exchange it for a different size or style, return it for store credit that never expires, or return it for a refund less a 30% restocking fee. The store credit option is the most flexible — it never expires and can be applied to any product, so there is no pressure to decide on a replacement immediately. A few things to keep in mind when trying it on at home. Wear the undergarments you plan to wear to your event, including whatever shapewear you are considering, so you get an accurate read on the fit. The one-shoulder neckline and open back mean there is very little structure anchoring the bodice — fit through the hips and waist will be your primary indicator of whether the size is right. If the hips and waist fit cleanly but the sweep train feels long or the shoulder drapes awkwardly, those are both tailoring fixes rather than sizing issues. For this specific gown, the jersey fabric means the dress will feel noticeably different lying flat versus on your body — jersey activates with movement, so walk around in it, sit down, and try a few turns before making your decision. A dress that feels borderline in a static try-on often feels completely different once you are actually moving in it. Mac Duggal 26266 is a size 0–12 range, so if you are on the edge between two sizes, ordering both and returning the one that does not fit is a practical approach. The store credit policy means the return cost is just the restocking fee on the one you keep — and you walk away knowing you have the right size. If you have questions about sizing before ordering, the Marlas team can walk you through measurements and compare them to Mac Duggal's size chart. Reach out anytime before placing your order.
Mac Duggal 26266 has a fully open back that drops to the waist — the back construction is a design feature rather than a closure system. The gown holds its structure through the jersey fabric and the contoured bodice construction rather than through a back fastening. There is no zipper running down the back and no lace-up panel; the opening is intentional and remains open during wear. For fit adjustability, this means the primary sizing lever is through the hips and waist rather than through any back adjustment. Jersey fabric has natural stretch, which gives the gown some flexibility across sizes, but it will not accommodate more than about half a size of variance at the waist or hips without looking either strained or loose. If you are between sizes, sizing up is the standard recommendation for mermaid silhouettes specifically — the hip-to-knee section is where fit tension shows first. If the gown fits well through the hips and waist but feels slightly loose at the bodice or shoulder, a tailor can take in the side seams at the upper body without disturbing the open back. That is a straightforward alteration for any experienced formalwear tailor. Marlas Fashions recommends budgeting for at least a consultation with a tailor once your gown arrives, particularly for a body-conscious silhouette like this one where small variations in fit make a visible difference.
Mac Duggal 26266 runs true to size for most customers. The gown is available in sizes 0–12. For a fitted mermaid silhouette in jersey, the most important measurements are bust, waist, and hips — and of those three, hip measurement is the most critical because the mermaid silhouette is tightest through the hip-to-knee section. To measure: take your hip measurement at the fullest point, which is usually about 7–9 inches below your natural waist. Compare that number directly to Mac Duggal's size chart. If your hip measurement places you between sizes, size up — a slightly looser fit through the hips is easier to tailor than a dress that pulls through the mermaid section. For height, the gown is designed for a height of approximately 5'9" in heels. If you are shorter, the sweep train will be longer relative to your frame and the hem will need to be taken up. This is a standard alteration for any formalwear tailor. If you are taller, the train may sit closer to the floor than expected, which is generally fine for this style. Budget for a hem alteration as a baseline when ordering any floor-length gown.
Mac Duggal 26266 is designed for formal evening occasions. It is a natural fit for prom, galas, and formal evening events where a long, body-conscious gown is appropriate. The open back and sleek silhouette give it a specific register — it is a dressed-up evening gown, not a conservative formal, which means it is best suited to events where a more dramatic look is expected or welcomed. Prom is the strongest single-occasion fit: the silhouette, color, and construction all read as prom-forward, and the powder blue is a perennially popular prom color. For galas and formal evening events, the gown works when the dress code calls for floor-length and the venue or event supports a more fashion-forward look. For black-tie events specifically, the open back means it skews toward the more fashion-forward end of black-tie rather than the conservative end — worth considering depending on the specific event. The open back and one-shoulder silhouette mean a significant portion of the upper body is bare, which makes it inappropriate for religious ceremonies, conservative formal contexts, or events with a covered dress code. Call or text our Toronto boutique at 416-536-2956 and our stylists will help you find your perfect dress.
Mac Duggal 26266 has built-in support in the bodice — the jersey construction at the bust provides enough structure for most customers without additional undergarments. There are no built-in cups, but the fabric holds its shape and the contoured bodice provides coverage and support through the bust without requiring a bra. For undergarments, the open back eliminates most standard bra options — any bra with a back band will show. Adhesive bras or stick-on cups are the standard solution for this style and work well with jersey because the fabric lies smooth against the body. Make sure to test your adhesive solution before the event day, particularly if you plan to wear it for several hours or in a warm venue. For the lower body, the fitted mermaid silhouette through the hips means any smoothing shapewear should end at or above the knee to avoid interfering with the mermaid flare. High-waist thigh-length shorts in a seamless fabric are the most practical option. Avoid anything with a visible waistband or seam line at the hip, as jersey shows texture underneath. If you are uncertain about undergarment options, reaching out to the Marlas team before ordering is a good move — they can advise based on your specific measurements and the fit you are looking for.
Mac Duggal 26266 is built for movement in a way that most mermaid gowns are not. Jersey as a base fabric has natural stretch and recovery, meaning the gown moves with you rather than against you. The mermaid silhouette does restrict stride length — that is the nature of the cut — but the jersey construction means the restriction is elastic rather than rigid. You will find a comfortable walking stride quickly, and dancing is very manageable as long as you are moving from the knee rather than taking long steps. The sweep train adds a small amount of fabric at the back hem, but because it is cut from the same jersey rather than being a separate attached layer, it moves naturally with the skirt and does not tend to catch underfoot. For dancing, the train will sweep behind you with the movement of the gown — it is one of the features that makes this dress particularly photogenic in motion. The one-shoulder neckline means one arm is fully free and the other has the shoulder fabric as a very light anchor point — there is nothing restricting arm movement on either side. The open back means the upper body has complete freedom of movement. Overall, this is one of the more comfortable mermaid silhouettes to wear for a full evening, particularly compared to gowns with stiffer base fabrics or more elaborate construction. Every 26266 order is hand-inspected before shipping so the fit and finish arrive flawless. If you are between sizes on the 26266, send our team your measurements before ordering and we will advise. Popular colorways of the 26266 sell out quickly each season, so early orders get first pick. Our stylists fit the 26266 in the boutique every week and know exactly how it runs. Every 26266 order is hand-inspected before shipping so the fit and finish arrive flawless.