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Clarisse 810420 Fully-Sequined Mermaid Gown
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Standard: arrives in 7 to 12 days
Express: arrives in 4 to 6 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: Clarisse 810420
Clarisse 810420 is a fully-sequined long mermaid gown built for maximum impact. Every square inch of the dress — from the sweetheart bodice to the sweep train — is covered in iridescent sequins on a stretch-jersey base. Spaghetti straps frame the sweetheart neckline, and the crisscross lace-up back leaves the majority of the back open. Clarisse 810420 is available in six colors: Amethyst Purple, Black, Deep Red, Hunter Green, Light Blue, and Sapphire Blue.
Fit & Silhouette
This is a true mermaid silhouette — the gown hugs tightly through the bust, waist, and hips, then flares outward at the hem into a small sweep train. The stretch-jersey base gives the sequin layer real mobility so the dress moves with you rather than against you. The bodice is structured with internal boning to keep the sweetheart neckline in place all night. The crisscross lace-up back lets you dial in the fit across the waist — useful if you fall between sizes.
Fabric & Detail
The base fabric is stretch jersey, which is the reason the gown fits as closely as it does without feeling rigid. Layered over the jersey is an all-over sequin surface — iridescent AB-finish sequins in colorways like Light Blue catch the light differently from every angle. The sequin coverage runs from the top of the sweetheart cup to the hem of the train with no plain fabric visible anywhere on the dress. The sweep train adds a formal finish at the back without being long enough to get in the way on the dance floor.
Key Features
- Fully-sequined from sweetheart bodice to sweep train
- Stretch-jersey base for comfort and mobility
- Internal boning in the bodice for structure and support
- Spaghetti straps with sweetheart neckline
- Crisscross lace-up open back — adjustable fit
- Sweep train at the hem
- Available in six colors: Amethyst Purple, Black, Deep Red, Hunter Green, Light Blue, Sapphire Blue
Style & Occasion
Clarisse 810420 is built for prom, pageants, and formal evening events where a fully-sequined gown is the right call. The mermaid cut and open crisscross back make it a strong choice for anyone who wants to wear something body-conscious and memorable. Pair it with strappy heeled sandals and drop earrings — the sequins do the heavy lifting so accessories can stay simple. If your court or damas group is dressing in coordinating colors, the six available colorways make it easy to build a matched or complementary lineup. For pageant competitions, the all-over iridescent sequin gives the gown the stage presence needed under bright lights.
Size & fit
- Fitted (mermaid). Bust, waist and hips all matter. Go by your largest measurement.
- Length: Long
- Neckline: V-Neck
- 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.
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
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
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Clarisse 810420 Fully-Sequined Mermaid Gown with Sweetheart Neckline
Sale price $473 CAD
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Frequently Asked Questions
Clarisse 810420 is a fitted mermaid gown, which means the silhouette works best when the dress fits closely through the torso and hips. Here is what that means in practice for different body types and what to think about before you order.
For hourglass or athletic figures, the mermaid cut follows natural curves well. The sweetheart neckline frames the collarbone and chest without requiring extra hardware to stay in place because the internal boning holds the cup steady. The crisscross lace-up back adds adjustability across the waist — if your waist is narrower than your hips relative to standard sizing, you can lace it tighter at the top and let it ease toward the hem.
For pear-shaped figures, the all-over sequin surface and the sweetheart neckline draw attention to the upper body, which many customers in this category prefer. The mermaid flare at the hem means the skirt does open outward below the knee, so you will have room to walk and move comfortably even though the hip and thigh area fits closely.
For fuller figures, the stretch-jersey base is the key detail. Jersey gives with the body rather than resisting it, which is why a stretch-sequin mermaid gown can be more comfortable than it appears. The internal boning in the bodice helps the gown stay structured without depending entirely on tension.
For petite customers, the full-length mermaid in a column-hugging silhouette can be very flattering, but hemming is almost always needed. Bring the shoes you plan to wear to your alterations appointment so the hem length is set correctly for the added height.
Sizing runs standard formal sizing. Measure your bust, waist, and hips, then compare to Clarisse's size chart rather than going by your street clothing size — formal sizes differ. If you are between sizes, most customers in a close-fit mermaid gown size up to give the lace-up back room to cinch, rather than sizing down and adding tension across the hips. If you have specific fit questions about your measurements before ordering, our team is here to help.
Because Clarisse 810420 is covered in iridescent sequins from top to bottom, the goal with accessories is to complement the dress without competing with it. The sequins already deliver all the sparkle the look needs, so the best approach is to choose pieces that feel intentional rather than adding more shine on top of shine.
For shoes, strappy heeled sandals are the strongest pairing. A thin metallic strap — gold, silver, or champagne — disappears against the sequin hem and elongates the leg through the slit at the back flare. Block heels or kitten heels also work if you want more stability for a long night. Avoid very chunky platforms, which can visually break the column line of the gown. If you are in the Black colorway, a nude or clear strap sandal keeps the silhouette sleek. For Light Blue or Sapphire Blue, silver or pewter metallics read beautifully.
For jewelry, drop earrings or small chandelier styles frame the face well with the sweetheart neckline and spaghetti straps. Because the straps are narrow and the neckline is open, a delicate pendant necklace can work if you want one — but most customers find the dress looks best with earrings only. Avoid wide statement necklaces that sit against the sequin bodice and get visually lost. A simple cuff or bangle bracelet in gold or silver is fine.
For hair and other accessories, an updo or a half-up style keeps the focus on the open crisscross back, which is a central feature of the gown. If you wear a wrap or cover-up to the venue, choose something lightweight — a faux-fur stole or a sheer wrap pulls attention upward when the sequin skirt is the real statement. A small clutch in a matching or neutral metallic tone completes the look without adding bulk.
If you are choosing between colorways and want accessory guidance, the Amethyst Purple pairs well with gold or rose gold, while Deep Red and Hunter Green work with both gold and silver depending on skin tone. Light Blue with silver accessories is a particularly clean combination.
Clarisse 810420 ships from our Los Angeles and New York warehouse locations for US customers, and from our Toronto distribution point for Canadian orders. Standard delivery is 7 to 12 business days from the time your order is placed and confirmed.
Rush processing is available if you need the gown faster — select the rush option at checkout or contact us before placing your order so we can confirm availability for your date. Rush orders are fulfilled from whichever warehouse has your size and color in stock at the time.
For US and Canadian orders there are no import duties. International shipping is also available with full tracking from dispatch to delivery. Shipping timelines for international destinations vary by region — contact us for an estimate for your specific country before ordering if your event date is firm.
Once your order ships, you will receive a tracking number by email so you can follow the package to your door. If you have a specific event date in mind, let us know at the time of purchase and we will flag the order accordingly to make sure it is prioritized appropriately. Planning four or more weeks ahead of your event date gives you the most flexibility for any adjustments after the dress arrives.
If Clarisse 810420 arrives and it is not quite right — wrong size, different than expected in person — you have three options: store credit that never expires, an exchange for a different size or color, or a refund minus a 30% restocking fee.
Store credit is the most flexible choice if you are planning to order again. It has no expiration date, so you can use it when your next occasion comes up rather than rushing into a replacement decision. Exchanges work well if you simply need a different size or colorway of the same gown.
To start a return or exchange, contact us within the return window from the delivery date. The dress must be in original unworn condition with tags attached — it cannot have been altered, worn to an event, or washed.
If you are unsure about sizing before you order, ordering one size up and planning for minor alterations is often the smarter path than ordering multiple sizes and returning one. Seamsters can take in a close-fitting mermaid gown more easily than they can let one out. If you want to talk through sizing before committing, reach out and we can help you compare your measurements to the Clarisse size chart before you place the order.
A few things stand out when you compare Clarisse 810420 to other sequin mermaid styles in the same range. First, the sequin coverage is genuinely all-over — there is no plain jersey bodice with a sequin skirt, or sequin panels with mesh sections. The sequins run from the top of the sweetheart cup to the end of the sweep train without interruption. That is rarer than it looks in product photography, where selective sequin can read as full coverage.
Second, the base fabric is stretch jersey rather than a rigid structured fabric. That matters because a closely fitted mermaid gown needs to move when you walk and sit, and stretch jersey allows that in a way that many structured sequin gowns do not. The internal boning in the bodice provides structure where it is needed — at the sweetheart cup — without making the whole dress stiff.
Third, the crisscross lace-up open back is a design detail that doubles as a fit tool. Most mermaid gowns at this length have either a hidden zipper or a basic corset back. The crisscross construction on 810420 is visible from behind and intentional as a style feature, not just a closure mechanism. It also means the waist fit is adjustable after you receive the dress without going to a seamstress.
Finally, six colorways are available — photographed, not just listed — which gives you a reliable sense of how the sequin reads in each color before you order.
The back of Clarisse 810420 uses a crisscross lace-up construction. Lacing cords run across the open back in a crossing pattern, and you adjust the tension by pulling the laces tighter or looser at each cross-point, then tying them off at the bottom.
Because the back is largely open — the lacing cords are the primary closure rather than a zipper with a small lace-up accent — you will want someone to help you lace it on the day of your event. It is not designed to be self-fastened. For the best result, put the dress on, have your helper start lacing from the top and work downward, adjusting tension evenly on both sides before tightening fully at the bottom.
If you are between sizes, the lace-up back gives you meaningful adjustment range. Customers who are a half-size larger in the hip than the waist often find that lacing the top section more loosely and tightening through the natural waist gives a more comfortable fit than either sizing up or down would have achieved with a zipper-back gown.
The laces themselves are typically a satin or grosgrain cord in a matching color to the dress. Do not cut them to length before your event — tie them in a flat bow and tuck the excess inside the gown at the waistline for a clean look from behind.
Yes — the six available colorways make Clarisse 810420 particularly well-suited to group coordination. Amethyst Purple, Black, Deep Red, Hunter Green, Light Blue, and Sapphire Blue have all been photographed, so you can see exactly how each color reads in the same sequin finish rather than guessing from a color chip.
For a prom court where members want to wear the same gown in different colors, the identical silhouette across all colorways means the group reads as cohesive in photographs even when the colors vary. The sweetheart neckline, spaghetti straps, and mermaid silhouette are consistent regardless of which colorway each person chooses.
For a quinceañera court or damas group, the same logic applies — but note that this particular gown reads as a prom and pageant style rather than a traditional quinceañera ballgown. If the event styling calls for a more traditional look, a different silhouette may be a better fit for the damas.
If you are ordering multiple gowns for a group, contact us before placing individual orders. Our concierge team can confirm stock levels across sizes and colors so you are not caught short on one colorway. Text us at +1 416-536-2956 or reach us on WhatsApp at +1 213-868-3131 and we will pull inventory counts for you before you commit.
Clarisse 810420 runs in standard formal sizing, which typically runs one to two sizes smaller than everyday clothing. A customer who wears a size 8 in jeans, for example, might need a size 10 or 12 in formal sizing depending on their measurements — so do not use your street size as a starting point.
To find your size, measure three points: your bust at the fullest part, your natural waist, and your hips at the widest point. Compare all three measurements to the Clarisse size chart and size to whichever measurement is largest. For a close-fitted mermaid gown, the hip measurement is usually the deciding factor.
Because the back is a crisscross lace-up rather than a fixed zipper, there is adjustment range in the waist and back — but the hip and bust measurements are fixed by the structure of the gown, so those are the critical numbers. If your hip and bust fall in different size brackets, ordering the larger size and having the waist taken in by a seamstress is typically the cleaner solution.
The gown includes internal boning in the bodice, which means the bust area is supported without a separate bra in most cases. If you are a larger cup size, check whether the sweetheart cup in your ordered size provides the coverage and lift you need — our team can help you think through this if you share your measurements before ordering.