American kennel club (AKC) brand thundershirt, in gray. For separation anxiety. “Calming coat” thunder shirt, thunder vest. Wraps around with Velcro to keep them Feeling snug and secure. According to AKC site, medium is a good size for fox terriers, beagles, corgis, Boston terriers, and Westies. See size chart and measurements in photos for accurate fit. Excellent preowned condition.