Sea Glass Dress by The Great. Rent the Runway Free People Sea Glass Midi Dress Black Floral 10 Black midi dress Lydia Sea Glass Cowl Neck Satin Bridesmaid Dress Birdy Grey Elegant Strap Seagreen Crystal Detailed Ruched Midi Dress with Middle Bridesmaid Dress Sea Glass Color Gem. The Sea Glass Midi Dress is our new favorite spring look. With a 3 4 length puff sleeve, tie front corset style bodice, and a smocked back, it's the perfect dress for all occasions. Material: 100% Cotton. Measurements for a size 4: Bust: 15. 5", Length: 45".