Bont Size Chart

Bont Skates

Bont size	3	3.5	4		4.5		5		5.5		6		6.5		7		7.5		8	8.5
Foot length (cm)	22.8	23.2	23.6		24.1		24.5		25		25.4		25.9		26.3		26.8		27.2	27.6
Bont size	9	9.5	10	10.5		11		11.5		12		12.5		13		13.5
Foot length (cm)	28.1	28.5	29	29.4		29.9		30.3		30.8		31.2		31.7		32.1

To measure your foot we recommend placing your foot on a piece of paper and while standing trace around your foot with a pen or thin tipped marker. Then measure the outline at the longest part (this can be from the big toe to your heel or maybe even from one of your other toes to your heel).
We also recommend measuring both feet and using the largest measurement to pick the correct size. In most cases you can wear an extra pair of socks to make your foot bigger but it is a lot harder to make a boot bigger.

You can also check out the Bont website and use their size wizard.
Link: http://www.bont.com/quad/items/support/size.html