Fit : This product is Japan size (Asian size), which is about 1 size smaller than USA and EU standard size. Slim Fit with short in the body length for a more fashion-forward looks and a fashionable feel, and for a fit that won't bunch up. The T-shirt is not bulky or puffy. It is perfect to wear alone (outerwear T-Shirt) or as a layering (underneath other clothing) or a underwear(undershirt).Our model wears a tagged size Japan M(US S) and is 175cm/5'9″tall, 61kg/134lbs and 91cm/36" chest.Sizes available. ( Slim Fit with short in the body length for a more fashion-forward looks. Fits may vary by style or personal preference )･Tagged Japan S ( US XS ) Would be a good fit for Your Chest Measurement : 33-34"(84-86cm)･Tagged Japan M ( US S ) Would be a good fit for Your Chest Measurement : 35-36"(88-91cm)･Tagged Japan L ( US M ) Would be a good fit for Your Chest Measurement : 37-38"(93-96cm)･Tagged Japan XL ( US L ) Would be a good fit for Your Chest Measurement : 39-40"(99-101cm)･Tagged Japan XXL ( US XL ) Would be a good fit for Your Chest Measurement : 41-42"(104-106cm)The following provides approximate garment measurements. (Not body measurements)Please compare actual garment measurements of our product to another you may own.･Tagged Japan S (US XS)__Width: 17.3"__Length: 23.6"__Sleeve: 14.6"__Shoulder: 15.0"･Tagged Japan M (US S)__Width: 18.5"__Length: 24.8"__Sleeve: 15.7"__Shoulder: 16.1"･Tagged Japan L (US M)__Width: 19.7"__Length: 26.0"__Sleeve: 16.9"__Shoulder: 17.3"･Tagged Japan XL (US L)__Width: 20.9"__Length: 27.2"__Sleeve: 17.7"__Shoulder: 18.1"･Tagged Japan XXL (US XL)__Width: 22.0"__Length: 27.6"__Sleeve: 18.9"__Shoulder: 19.7"Width is half chest.Lay the clothing flat and measure 3 cm under the armhole. Measure from side to side.If you prefer a relaxed fit, please choose one size bigger.