Trixxi Women's Dress Size M - Knit Sundress with Embroidered Yoke - Built in Bra - Cute Keyhole Back. Fabric Content: 80% Polyester 16% Rayon and 4% Spandex. Armpit to armpit measures 17". Shoulder to hem is 35". Fits our size 4 manikin perfectly, so this is probably a Junior Size M. Very Good Used Condition - See Photos for Further Description.