Gliding Surface

[hockeydad3 51]

Does anyone of you know about the length of the gliding surface of different single radius rocker.I´m skating on T-blades and want to know my rocker radius to compare my runners. But they are only available in the rocker sizes L,M and S.

And the company won´t tell me about. I´m on M 5/8". If you press them on a flat surface and move  a sheet of paper from the front and the back towards the middle until there is a resistance my gliding surface is about 62mm (2,44").,

What about yours?