This is the ankle strap that fits on all FRx, FR1, FR2 and FR3 skates. It comes in 4 different sizes, but the sizes only indicate the length. So any size strap is able to be mounted on any size skate.

this strap is 20cm long from bolt to bolt if the strap is closed and if you use the velcro where it is supposed to stick, but there is for sure a margin of a few centimeters.

The width of the strap is 35mm

Mounting bolts included

ANKLE BUCKLES
These type of buckles or straps all have only one hole on both sides. They only vary in length. As long as the length will work, you can use any brand buckle on any brand boot.

Buckles that are mounted like this are called SBM2 which stands forStandardBuckleMountwith a total of2bolts.