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 sizeSize TableS: Shoulder:40cm Bust:88m Length:64cm Sleeve:21cmM: Shoulder:42cm Bust:92cm Length:66cm Sleeve:22cmL: Shoulder:43cm Bust:96cm Length:68cm Sleeve:22cmXL: Shoulder:45cm Bust:100cm Length:70cm Sleeve:23cm2XL:Shoulder:46cm Bust:104cm Length:72cm Sleeve:23cm3XL:Shoulder:48cm Bust:108cm Length:74cm Sleeve:24cm4XL:Shoulder:49cm Bust:112cm Length:76cm Sleeve:24cmRecommended reference size:height:150-155cm 35-42. 5kg Height: 155-160cm 40-47. 5kg Mheight:165-165cm 45-57. 5kg Height: 165-170cm 55-65kg XL Height: 170-175cm 62. 5-72. 5kg 2XLheight:175-180cm 70-82. 5kg 3XLheight:175-190cm 82. 5-100kg 4XLSize 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 baggy jogger shorts