This is a universal sealing clip for every kind of bag. It's designed to be very easy to print.
There are no overhangs in the hinge design and all angles are 45°. There is no need for support as well. I recommend a layer height of 0.24mm and at least 3 outer walls. Infill is not needed. There are two teeth with sharp points for a water tight sealing.
For every size there is an additional "closed" version. This version is not folded open and has a bit worse tolerances, so you can fit the clip on to your build plate. You will need to print this version with a raft to prevent elephant feet. If possible I recommend to use the non closed version.
The sizes are named by their actual usable length. If you can't find the size you like, just write it in the comments.
50mm ≈ 2in 100mm ≈ 4in 150mm ≈ 6in
If you have a special wish like a longer version or an engraved name, you can contact me at rean.schuette@ewetel.net as well.