This is a V-neck short-sleeved cut-and-sew top from "theory (セオリー)". I've only worn it twice. It is an authentic item from Link Theory Japan. Size: 36 (Length 61cm, Shoulder width 40cm, Body width 44cm, Sleeve length 19.5cm) Color: Navy Material: 100% Cotton The retail price was around 15,000 yen. Instant purchase is OK.