The tag is Japan size. US size is for reference only.
Refer to the following measurements.
Garment size
US XXS (JP XS)
Length: 79 cm, Shoulder width: 46.5 cm, Sleeve length: 56.8 cm, Chest: 115 cm
US XS (JP S)
Length: 81 cm, Shoulder width: 48 cm, Sleeve length: 58 cm, Chest: 120 cm
US S (JP M)
Length: 83 cm, Shoulder width: 49.5 cm, Sleeve length: 59.3 cm, Chest: 125 cm
US M (JP L)
Length: 85 cm, Shoulder width: 51 cm, Sleeve length: 60.5 cm, Chest: 130 cm
US L (JP XL)
Length: 87 cm, Shoulder width: 53 cm, Sleeve length: 61.5 cm, Chest: 138 cm
US XL (JP XXL)
Length: 89 cm, Shoulder width: 55 cm, Sleeve length: 62.5 cm, Chest: 146 cm