I made this for my snake enclosure because my old one was broken and the glass door couldn't be locked anymore.
It can fit tightly and look beautiful in any color.

It should be suitable for any 4 mm-thick glass with an aperture of 16 mm.
Refer to the model design in this link:https://www.reptiles.swelluk.com/vivexotic-replacement-door-stopper

A video showing its use and locking the box.