Navy Blue Square Long Sleeve Trumpet Mermaid Beading Prom Dress With Slit

The Silhouette · Sculpted & Elegant

Square neckline / Long sleeves / Side slit

01 / The Design

A clean neckline with a luminous finish

The square neckline gives the bodice a defined, architectural outline, while the long sleeves lend the look a polished sense of coverage. Navy blue brings depth to the design, creating a rich backdrop for the dress's beaded embellishment to catch the light.

Through the waist and hips, the trumpet mermaid shape follows the body's contours before opening toward the hem. A side slit introduces movement and a confident flash of leg, balancing the dress's covered upper silhouette with a more daring detail below.

A closer look at the dress's formal detailing and streamlined shape.

A guide to the design and fit

05 / Where to Wear It

A confident choice for formal evenings

This gown is suited to prom, formal dances, evening celebrations and other dressy occasions where a tailored silhouette feels right. Its navy color is classic enough for a timeless look, while the beading and slit bring a more contemporary edge.

The Overall Mood

Polished

Sculptural

Evening-ready

1. What makes this navy blue prom dress distinctive?

The design brings together several contrasting details: a structured square neckline, long sleeves, beaded embellishment, a fitted trumpet mermaid silhouette and a side slit. The deep navy shade keeps the overall look elegant, while the fitted shape and slit add drama. It is a strong option for someone who prefers a sleek formal gown over a full ball gown.

2. Is the dress floor length?

Yes. The design is listed as floor length. The way the hem falls can vary with your height, proportions, selected size and footwear. If you plan to wear high heels or want a particular hem position, consider those preferences when reviewing the size information and any custom-measurement options.

3. How should I choose the right size?

Start with your current body measurements rather than relying on your usual clothing size alone. Compare bust, waist and hip measurements against ANNAKOO's size chart, paying particular attention to the waist and hips because a trumpet mermaid dress is fitted through these areas. If your measurements fall between sizes or you are unsure how to measure, contact customer service before ordering. Custom measurements may be available as an alternative to a standard size.

4. Does the gown have long sleeves and a square neckline?

Yes. The listed design features a square neckline and long sleeves. The neckline creates a clean, defined frame across the upper body, while the sleeves give the gown a more covered formal look. These details also pair well with an updo, understated earrings or a simple evening clutch.</p