All size M fit S/M best imo to fit more comfortably as these are more fitted, not oversized. Approximately 18 across chest, 24 long front, 25 back. In excellent used condition only worn 1-3 times, just wrinkled from storage. Lightweight and stretchy 100% cotton. $20 each originally. Bundle with other items and save! Feel free to ask any questions. I ship same or next day. Smoke and pet free home.