This design was developed because some of the ones I tried to download and print were not strong enough. I designed this so it was easy to open and close as my wife has arthritis and has found other clips hard to use. I have printed these in PLA,PLA+ and PETG.
No support is needed and it is optimized for 0.2 layer height and a 0.4 nozzle.
I normally fill the bed with them and print a bunch of them using normal speed for first two layers and move on to sport mode for the remainder.
60mm version here 60 mm Bag Clip Print in Place by artlekoi - MakerWorld