This sweater has a mock neck (13" long) and just pulls over your head.This sweater has 3/4 batwing sleeves and has a very nice feel to the material. It is yellow/light mustard in color and has four nonfunctional dark colored buttons at the hem on each side seam. It is ribbed on the neck as well as the sides and the 7.5" of the ends of the sleeves. This is a very light weight sweater and wouldn't be a warm one. Being the sleeves aren't true with the armpit, the measurement will be from the outside of the ribbed seams.  It measures 41" across from armpit to armpit. The back measures 36" from the back of the neck to the square hem of the garment.  It is made of 70% acrylic and 30% rayon. It is machine wash/dry flat. It's new with the tag attached.