One of the main questions we get is what size plate to put on what size boot. Number one thing to remember is the axle distance makes all the difference. We recommend certain plate sizes and we use the below chart as our guide when building skates.
Axle to axle plate size chart
Recommended plate size chart

Snyder Skate Co. is a premium product, the best of the best for over 30 years. Designs are copied the world over. When you want the best it’s always been Snyder.
Snyder owner’s manual
Snyder axle distance chart

Other information that might be useful.
Laser size chart
Power-Trac size chart
Nova size chart
Avenger Sizing Chart
Avanti Sizing Chart