We guarantee the quality of the product. If you are unsure about the size, you can contact customer service. Just tell us your height and weight, and we will match you with the appropriate size Size Table S:    Shoulder:40cm Bust:88m Length:64cm Sleeve:21cm M:   Shoulder:42cm Bust:92cm Length:66cm Sleeve:22cm L:    Shoulder:43cm Bust:96cm Length:68cm Sleeve:22cm XL:  Shoulder:45cm Bust:100cm Length:70cm Sleeve:23cm 2XL:Shoulder:46cm Bust:104cm Length:72cm Sleeve:23cm 3XL:Shoulder:48cm Bust:108cm Length:74cm Sleeve:24cm 4XL:Shoulder:49cm Bust:112cm Length:76cm Sleeve:24cm Recommended reference size: height:150-155cm          35-42.5kg        S height:155-160cm          40-47.5kg        M height:165-165cm          45-57.5kg        L height:165-170cm          55-65kg           XL height:170-175cm          62.5-72.5kg     2XL height:175-180cm          70-82.5kg        3XL Size mearsured by ourselves, sometimes has some errors, but always within 3cm." Please note 1 cm = 0.39 inch,1 inch = 2.54 cm. Please feel free to contact us when finding difficulty in choosing size,we will give you the best option. Note: The decal on the chest of the product picture is a fixed size, the decal will not become larger as the size of the clothes increasess