Standard blades for this copter. Total length 55mm, motor shaft hole diameter 1mm. Including clockwise and counter-clockwise versions. Printed for my quadcopter Hubsan X4 H107C (last photo)Hard model, impossible to print without support at FDM tech. I've printed this on Russian 3D-printer Picaso 3D Designer at 0.1 mm layer resolution using autogenerated support from Picaso Polygon for Designer. Best results so far is printing it upside down. Hardest thing appeared was motor shaft hole, in original model for H107D it was 1,5mm, which was too big, I decreased it to 0.95mm and it's hardly visible, will experiment further.