1960s quintessential Mod school girl dress from I. Magnin.  The solid black part is an early polyester, and the cream and black print is cotton.  About a size 6, the dress measures approx. 15" across the shoulders, 22" outside sleeve length, 36" bust, 29" waist, 38" hips, and 37" overall length.  There is a little stretch to the black polyester, so measurements can vary somewhat.  The dress is in excellent condition.