Yes I know there are hundreds of bag clips out there. This is designed to be simple but have good tension, which is tricky for 3d printed clips.

You'll find hundreds of uses for these. Chip clip, LED string light clip, Towel holder, Clothes line clip, Note hanger.

Print it as is. Let it cool down completely then cross over the ends to form the clip.
I have used PETG and PLA+ so far and they work well. You should use supports.
Try printing at larger scales. 125%, 150%, etc.