I Am Small For My Age

so i always knew i was really small for my age and, but today i had a bit of a rude awakening. as some you may know the weather has been really nice here, so me and a girl from school went to town to get some swim suits and use her family's hot tub. now im Japanese and shes English and im a year older than her, yet im she in the avarge clothe sizes for my age and i was in ages 9 to 10 or 10 to 11. it was both annoying and embarrassing