The tag is Japan size. US size is for reference only.
Refer to the following measurements.
Garment size
US XXS (JP XS)
Length: 69 cm, Shoulder width: 49.5 cm, Chest: 108 cm, Sleeve length: 52 cm, Inseam: 68.5 cm, Waist: 63 cm
US XS (JP S)
Length: 71 cm, Shoulder width: 51 cm, Chest: 112 cm, Sleeve length: 53 cm, Inseam: 70 cm, Waist: 67 cm
US S (JP M)
Length: 73 cm, Shoulder width: 52.5 cm, Chest: 116 cm, Sleeve length: 54 cm, Inseam: 71.5 cm, Waist: 71 cm
US M (JP L)
Length: 75 cm, Shoulder width: 54 cm, Chest: 120 cm, Sleeve length: 55 cm, Inseam: 73 cm, Waist: 75 cm
US L (JP XL)
Length: 77 cm, Shoulder width: 56 cm, Chest: 126 cm, Sleeve length: 56.5 cm, Inseam: 75 cm, Waist: 81 cm
US XL (JP XXL)
Length: 79 cm, Shoulder width: 58 cm, Chest: 132 cm, Sleeve length: 58 cm, Inseam: 77 cm, Waist: 87 cm