This design is a 60mm varient of my other bag clip Bag Clip Print in Place by artlekoi - MakerWorld which is 100mm. 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 0.18 layer height and a 0.4 nozzle.
Use normal speed for first two layers and move on to sport mode for the remainder.