In order to reduce the inconvenience caused by the return and exchange, please measure the size with a down jacket that fits you best, and then select the appropriate size. The product is measured manually, and please allow 1-3CM error. ★US size 4 / manufacturer size S: shoulder 44cm, chest circumference 110cm, sleeve length 60cm ,total length 116cm ★ US size 6 / manufacturer size M: shoulder 45cm, chest 113cm, waist 88cm, sleeve length 61cm , total length 116cm ★ US size 8/ manufacturer size L: shoulder 46cm, chest circumference 117cm, waist 92cm, sleeve length 62cm ,total length 117cm ★ US size10 / manufacturer size XL: shoulder 47cm, chest circumference 120cm, waist 96cm, Sleeve length 63cm ,total length 118cm ★ US size12 / manufacturer size XXL: shoulder 48cm, chest circumference 122cm, waist 100cm, sleeve length 64cm ,total length119cm