I wasn’t sure if it would fit with the Thlevel mini digital thermometer/hygrometer from Amazon bc there wasn’t any measurements listed in the description but it fits t perfectly! Great looking, simple design that’s prints quickly!
I printed 4 of these and the opening was ~44mm and not the ~41mm of the actual hygrometer. If I did something wrong, I wonder what it was. maybe the new hygrometers are a bit smaller.