high quality nylon

XS size 25cm(bottom length)*35cm(height)*15cm(bottom thickness),advising height 100-115cm,age 3-5years old
S size 28cm(bottom length)*40cm(height)*18cm(bottom thickness),advising height 115-135cm,advising 1-3 grade
L size 32cm(bottom length)*46cm(height)*20cm(bottom thickness),advising height above 135cm,advising 4-9 grade
Maybe with 1-3cm size error.