Impression Bridal One Shoulder Purple Chiffon Bridesmaid Prom Formal Gown 10. Impression bridal gorgeous shade of purple chiffon formal gown with one shoulder, soft pleading fanning from the shoulder across the bust and around the waist. Back zip and lined. Measurements are approximate and taken while laying flat: 57 inches from shoulder to hem, 14.5 inches straight across the waist an 18 inches from armpit to armpit with molded cups to provide padding, accommodate cup size and reduce the need for a bra. Tag sizes 10 however with formal where I find it is best to use the measurements as your guide to ensure the proper fit for you