Rear arm measurements

[bishopjohn]

Hi I'm new here and I just got my mavic before having to fly out for work and wanted to order some decals for the rear arm but I can't find the dimensions of the rear arm to decide how large the decal should be. Can anyone measure the rear arm of the mavic to see what's the length of the flat part in front of the arm and the height for me? This would be greatly appreciated. I've uploaded a pic that I found on here with drawings trying to illustrate the measurements I need. Thanks