Long Sleeve Sequin Dress Shine on them and light up the room in this stunning long sleeve sequin mini dress. This curve hugging backless mini dress is covered with chic rainbow sequin, features rounded neckline, long sleeves, a deep scooping back and hidden zipper closure. Model is 5'5 wearing size L (10-12). Runs slightly small. Curvy ladies size up. Round neck. Rainbow colored sequin. Long sleeve. Backless. Mini length.