Solution

158483

First name
Dylan
School
Wharncliffe Side primary school
Country
Age
9

I estimated, and with G and F, I imagined if it would be folded and then estimated from that.

This is my answer:

E is the smallest,
D is the biggest,
B is the 2nd smallest,
G and F are both 3rd smallest,
C is 2nd biggest,
D is the biggest.