I tested a bunch of 31mm propellers for tiny whoops, and comparing their thrust, current draw and efficiency. We have propellers from HQ, Gemfan, HBFPV and Kingkong.
Here is a 2″ and 2.5″ propeller shoot-out for cinewhoops and micro FPV drones. These are common propeller sizes for 1103, 1105, 1106, 1204 motor sizes. Bookmark this page so you don’t miss out on any updates :)