It is Chinese size and smaller than the USA size.
Please check the size carefully.
US X-Small=China SmallLength22.44"(57cm),Bust37.01"(94cm),Shoulder14.96"(38cm)
US Small=China MediumLength23.23"(59cm),Bust37.80"(96cm),Shoulder15.35"(39cm)
US Medium=China LargeLength24.02"(61cm),Bust38.58"(98cm),Shoulder15.75"(40cm)
SportsX Men's Oversized Slim Fit Sleeveless Gilet Holes Denim Jacket Vest Black B07TH88PM8
The product shows here is available with several styles, colors and sizes. Please leave us a message on the payment page if the option is not allow to choose. We will ship the product as your request.