T-BOOTS SHOE SIZES
Size mm

All feet are different. 
The simplest way to determine size is to tell the factory in millimetres. 
Place both feet gently touching a wall and note the length of the longest toe to the wall. 
This is your size. 
Also we need to know whether your foot is wide or normal. 
This is enough to determine your size.

2 225
3 234
4 243
5 252
6 261
7 270
8 279
9 288
10 297
11 306
12 313
13 323