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    Shop 2026 ANNAKOO Long Sleeve Lavender Sequin Beading Trumpet Mermaid Prom Dress With Slit Under 339
    Shop 2026 ANNAKOO Long Sleeve Lavender Sequin Beading Trumpet Mermaid Prom Dress With Slit Under 339
    Shop 2026 ANNAKOO Long Sleeve Lavender Sequin Beading Trumpet Mermaid Prom Dress With Slit Under 339
    Shop 2026 ANNAKOO Long Sleeve Lavender Sequin Beading Trumpet Mermaid Prom Dress With Slit Under 339
    Shop 2026 ANNAKOO Long Sleeve Lavender Sequin Beading Trumpet Mermaid Prom Dress With Slit Under 339
    Shop 2026 ANNAKOO Long Sleeve Lavender Sequin Beading Trumpet Mermaid Prom Dress With Slit Under 339
    Shop 2026 ANNAKOO Long Sleeve Lavender Sequin Beading Trumpet Mermaid Prom Dress With Slit Under 339
    Shop 2026 ANNAKOO Long Sleeve Lavender Sequin Beading Trumpet Mermaid Prom Dress With Slit Under 339
    Shop 2026 ANNAKOO Long Sleeve Lavender Sequin Beading Trumpet Mermaid Prom Dress With Slit Under 339
    Shop 2026 ANNAKOO Long Sleeve Lavender Sequin Beading Trumpet Mermaid Prom Dress With Slit Under 339
    Shop 2026 ANNAKOO Long Sleeve Lavender Sequin Beading Trumpet Mermaid Prom Dress With Slit Under 339
    Shop 2026 ANNAKOO Long Sleeve Lavender Sequin Beading Trumpet Mermaid Prom Dress With Slit Under 339

    Long Sleeve Lavender Sequin Beading Trumpet Mermaid Prom Dress With Slit

    $311.10

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    ANNAKOO / EVENING COUTURE

    THE LAVENDER EDITION

    Lavender in Full Sparkle

    Long-Sleeve Lavender Sequin Beading Trumpet Mermaid Prom Dress with Slit

     
     
    ANNAKOO long-sleeve lavender sequin and beaded trumpet mermaid prom dress with a fitted silhouette and high side slit
    LAVENDER / 01

    A Study in Light, Texture & Line

    THE DESIGN SIGNATURE

    Soft lavender.
    Sculpted glamour.

    A delicate lavender tone meets an all-over sequin and beaded finish in this long-sleeve mermaid prom gown. The close-fitting silhouette traces the bodice and hips before opening into a trumpet-style flare, creating a defined, elongated outline.

    The high side slit introduces a more daring detail to the floor-length design, while the embellished sleeves carry the sparkle from shoulder to wrist. The result balances full-coverage sleeves with a sleek, figure-conscious shape.

    THE ESSENTIALS

    Lavender · Long sleeves · Sequin and beading · Trumpet mermaid silhouette · High side slit · Floor length

     

    COLOR NOTE / LAVENDER

    Romantic in color, striking in silhouette.

    Lavender gives this embellished evening gown a softer color story than traditional dark formalwear. Sequins and beadwork bring decorative shine, while the fitted mermaid line adds definition. It is a distinctive option for prom, formal evenings and special celebrations.

    DESIGN ANATOMY

    The Details That Define It

    SIX DESIGN ELEMENTS

    01

    All-Over Embellishment

    Sequins and beading create a richly decorated surface, giving the gown its signature sparkle rather than relying on a plain fabric finish.

    02

    Long Fitted Sleeves

    The long-sleeve design adds coverage across the arms and extends the embellished look for a cohesive, polished finish.

    03

    Trumpet Mermaid Shape

    A fitted bodice and hip line lead into a flared lower skirt, emphasizing the gown's sculpted outline and floor-length proportions.

    04

    High Side Slit

    The slit breaks up the long skirt line and reveals the leg as you walk or pose, adding contrast to the otherwise covered silhouette.

    05

    Soft Lavender Palette

    The light purple tone brings a romantic quality to the sequin surface and offers an alternative to classic black, navy or jewel-tone prom dresses.

    06

    Floor-Length Finish

    The long hem completes the formal look. Heel height and body measurements should be considered when checking the final length and slit placement.

     
    Detail view of the lavender sequin and beaded embellishment on the ANNAKOO long-sleeve mermaid prom dress

    DETAIL STUDY / 02

    THE SURFACE STORY

    A closer look at the sparkle.

    The embellished finish is central to this gown's identity. Sequins and beading provide a detailed surface that contrasts with the clean outline of the fitted silhouette. The same decorative language continues across the long sleeves, helping the overall design feel coordinated from top to bottom.

    For the most balanced styling, choose understated earrings and a streamlined evening bag. Let the lavender color and embellished fabric remain the focus of the outfit.

     

    THE STYLING EDIT

    Keep the accessories considered.

    Silver, crystal or soft champagne-toned accessories can complement the lavender color and reflective embellishment. A sleek hairstyle can emphasize the neckline and sleeves, while soft waves create a more romantic finish.

    Because the silhouette is fitted through the hips and opens into a flare, test sitting, walking and dancing before the event. Choose shoes that work with the floor-length hem and allow comfortable movement around the side slit.

     

    WHERE IT BELONGS

    Prom · Formal Parties · Evening Receptions

    This lavender long-sleeve sequin mermaid dress suits prom and other dressy occasions where a fitted silhouette, intricate embellishment and a high side slit create a confident evening look.

    A NOTE BEFORE PURCHASE

    Fit & Garment Care

    Choosing Your Size

    Compare your bust, waist and hip measurements with the current product size chart. As the bodice, sleeves and hip area are fitted, prioritize accurate measurements rather than relying on your usual clothing size alone.

    Caring for Embellishment

    Sequins and beads need gentle handling. Follow the garment's care label and consult a professional cleaner experienced with embellished eveningwear. Avoid machine washing or applying direct high heat to decorated areas.

    THE FIT & DESIGN GUIDE

    Frequently Asked Questions

    Helpful details about the lavender color, fitted mermaid silhouette, embellishment and side slit before you choose your prom dress.

    1. What makes this lavender mermaid prom dress distinctive?

    Its defining features are the lavender color, long embellished sleeves, sequin and beaded surface, fitted trumpet mermaid silhouette and high side slit. The fitted shape creates a sleek line through the bodice and hips, while the lower flare and slit add contrast. This combination makes the gown a distinctive choice for shoppers who want a glamorous look with more arm coverage than a sleeveless prom dress.

    2. Is the dress fully embellished, including the sleeves?

    The product design features sequin and beaded embellishment across the gown, including the long sleeves. This creates a coordinated look instead of placing all the decorative detail in one area. Because the garment contains embellishment, handle it carefully when dressing, storing or arranging alterations, and ask a specialist cleaner about appropriate care.

    3. What does the trumpet mermaid silhouette look like?

    A trumpet mermaid silhouette follows the body through the bodice and hip area before opening into a flare lower down. This gives the gown a more sculpted profile than a full ball gown or an A-line dress. The shape is especially suitable for shoppers who prefer a close-fitting formal silhouette, but the hip and thigh measurements are important when choosing a comfortable size.

    4. Does the side slit make the dress easier to walk in?

    The high side slit creates an opening in the long skirt and can allow more leg movement than a fully closed skirt. However, the gown remains fitted through the hips and thighs, so the amount of comfortable movement depends on the fit and your measurements. Try walking, sitting and taking larger steps while wearing the intended shoes before the event to make sure the slit and hem work for you.

    5. How much leg does the slit reveal?

    The product is described as having a high side slit, but the exact opening can vary with the garment size, body proportions and how the dress sits when worn. If slit coverage is a priority, review all available product photographs and contact the seller for clarification before ordering. A professional tailor may be able to advise on possible adjustments, depending on the construction of the dress.

    6. Is lavender a good color for prom and formal events?

    Lavender offers a softer alternative to black, navy and deeper jewel tones. Paired with sequins and beading, it combines a romantic color with a dressy finish. Silver jewelry, crystal accents and understated metallic shoes can complement the palette. If you are matching a specific event color scheme, compare the product photographs with your accessories in similar lighting, as screen settings can affect how the shade appears.

    7. How should I choose the right size for a fitted mermaid gown?

    Measure your bust, waist and hips and compare each measurement with the current size chart. The hip area deserves particular attention because the silhouette is fitted before the skirt flares. Do not automatically size down to achieve a closer fit, as a dress that is too tight can restrict walking and sitting. If your measurements fall between sizes, ask customer service which option is most appropriate for this specific design.

    8. Will the long sleeves feel restrictive?

    The fitted sleeves contribute to the gown's streamlined look, but comfort depends on sleeve measurements, fabric construction and your range of motion. Check the size information carefully and allow room for natural arm movement. When trying the dress on, raise your arms gently and bend your elbows to check whether the sleeves feel comfortable before committing to wearing it for a full evening.

    9. What shoes and jewelry pair well with this dress?

    Silver, crystal and subtle champagne-toned accessories work well with lavender and can complement the embellished surface. Minimal earrings or a simple bracelet can prevent the accessories from competing with the gown's decorative details. Choose shoes that suit the floor-length hem and provide enough stability for walking in a fitted skirt with a slit. Check the complete outfit together before the event.

    10. How should I clean and store a sequin and beaded prom dress?

    Always check the garment's care label first. Sequins, beads and embellished tulle can be sensitive to friction, heat and unsuitable cleaning products, so avoid machine washing unless the care instructions explicitly permit it. A professional cleaner experienced with decorated eveningwear is a safer choice when the correct method is unclear. Store the dress in a clean, breathable garment bag and protect the embellishment from snagging against jewelry, zippers or rough fabrics.

    11. What occasions suit this long-sleeve lavender gown?

    The gown is designed for prom and can also suit formal parties, evening receptions and other dressy celebrations where embellished formalwear is appropriate. Its long sleeves and lavender palette create a different look from a strapless or sleeveless gown, while the fitted mermaid shape and high slit maintain a dramatic evening profile. Check the dress code and venue requirements before selecting it for a specific event.

    12. What should I check when the dress arrives?

    Inspect the overall fit, sleeve length, zipper, hem and embellished areas soon after delivery. Try the dress with your intended shoes and check whether the slit falls as expected when standing and walking. Avoid pulling on the sequins or beads while handling the gown. If you notice a sizing or construction concern, contact the seller promptly and keep your order information available so the issue can be reviewed before your event.

    ANNAKOO / EVENING COLLECTION

    A softer shade. An unforgettable silhouette.

    Discover the lavender long-sleeve sequin mermaid prom dress, defined by its embellished finish, fitted trumpet silhouette and high side slit.

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