Simplicity 3429; ©1951; Teen Age One-Piece Dress in Afternoon and Ballerina Lengths (Detachable Vestee and Ruffle): Both dresses feature a low U neckline filled in with a ribbon-trimmed contrast vestee. The skirt is fashioned with soft pleats front and back. Style 1 has three-quarter sleeves trimmed with a ruffle and a pointed collar. Ballerina length Style 2 is short sleeved.