This model is designed to be printed in a FLEXIBLE FILAMENT such as TPU or other TPE. It WILL NOT WORK if printed in a rigid filament such as PLA or ABS.

The loop can be stretched around the flashlight to settle in the slot for the clip.

The diameter of the larger circle that holds the flashlight is 19.25mm, and it is 4mm thick.

Five different keychain/lanyard loop sizes have been provided, from 3mm to 5mm in diameter in ½mm increments, in 3MF and STEP formats.

I couldn't use a decimal to denote the fractional diameter files because .5mm might be interpreted as the file extension, and I couldn't use a comma because I have standards; but it turns out that I can include a “½” in a file name just fine, so that's what I did.