The waffle polo shirt and shorts is sold as a set with one combined size selector. The top and shorts have separate charts, so the decision is whether one row fits both pieces, not whether the shirt alone fits.

Compare the pair in one row

For the S(US)/M(Japan) option the top lists 116 cm bust, 51 cm shoulder, 22 cm sleeve and 70 cm length; the shorts list 68 cm waist, 106 cm hip and 48 cm length. At XL(US)/2XL(Japan), those figures become 128, 54, 25 and 76 for the top, and 80, 116 and 51 for the shorts. Measure a relaxed polo and a comfortable pair of shorts you own at the same positions. If the shirt suggests S but the shorts suggest L, ask whether pieces can be mixed; the current single selector does not promise that.

The chart labels the shorts’ waist but does not say whether 68–80 cm is a relaxed or stretched elastic measurement. It also omits leg opening and rise. The source calls the material polyester and the cut loose; it gives no waffle thickness or care test. Request a close fabric photo and finished garment measurements for the exact combined option before assuming a size conversion between US and Japan labels.