1960s Forever Prest By Peggy Gee sleeveless dropwaist Dress in dark blue, red and white plaid. Cotton And polyester blend. Back metal zip closure. Volup friendly with back metal zipper that says falcon on the pole. Round faux Peter Pan collar with three button decorative placket. Drop waist as mentioned with 14 inches of knife pleat skirt. Laying flat measures 21 inches armpit to armpit, 20.5 inches straight across the waist and 38 inches shoulder to hem. Based on the measurements, I estimate this to be approximately a modern size XL, but please double check measurements to ensure the proper fit for you.