WEDTREND Women Mermaid Bridesmaid Dress Sky Blue Square Neck Wedding Stunning Blue Wedding Guest Dresses (Ever Pretty review) Royal Blue Mermaid Wedding Dresses Classic Square Neck Mermaid Wedding Dress with Embroidered Long Sleeve. Elegant and sophisticated, this mermaid blue wedding guest dress features a flattering square neckline and sleeveless silhouette. The fitted bodice flows into a graceful mermaid skirt that creates a stunning silhouette perfect for formal occasions. The rich blue hue complements all skin tones, while the timeless design ensures you'll look polished and put together at any celebration. An ideal choice for weddings, galas, and upscale events where you want to make a memorable impression.