This is a size 13-14 years old for overseas. It seems that the size was a pretty snug fit for children of that age. My daughter was wearing a Japanese size 150cm and had a little room to spare. Her tastes changed quickly, and she only wears long pants now, so she only wore these once or twice and they are in good condition (^-^). Measurements are approximate, taken flat: waist 28cm, total length 30.5cm. The size is listed as 160 just in case. For those who like Lovetoxic, Global Work, ikka, coen, UNIQLO, GU, Breeze, apres les cours, Devilock, etc. (^^)