Roof Rack Clearance From Glass?

[x2ms]

Can someone measure the distance from the top of the OEM roof rack to the top of the glass? Interested in the smallest measurement as if a flat board was laid across the two bars and the smallest space was measured to understand how much clearance there is for ski bindings.

 

[MY2Ski]

Seems to be about 1-7/8" and the cross bars follow the curve of the glass.