The following is an explanation of the sock sizes sold in this online store.
■Men's/Women's/Unisex
・S:22cm-24cm
・M:25cm-27cm
・L:28cm-30cm
・XL:30cm-31cm
・XXL:32cm-33cm
・XXXL:33cm-34cm
・2022:20cm-22cm
・2224:22cm-24cm
・2325:23cm-25cm
・2426:24cm-26cm
・2527:25cm-27cm
・2729:27cm-29cm
・2830:28cm-30cm
・3032:30cm-32cm
■Children/Infants
・KXS:9cm-11cm
・KS:12cm-13cm
・KM:14cm-15cm
・KL:15cm-16cm
・KXL:17cm-18cm
・KXXL:19cm-21cm
・1012:10cm-12cm
・1214:12cm-14cm
・1416:14cm-16cm
・1719:17cm-19cm
・1921:19cm-21cm
・2224:22cm-24cm
The sizes listed above include some overlapping sizes, but the smaller sizes fit better than the larger sizes, and the larger sizes are more roomy than the smaller sizes.