Clothes pin one piece

A one piece clothes pin that should be fairly easy to print out wall thickness set at 1.2mm. I saw one of these made out of bent steel and thought the design would work well out of PLA, so I modeled up the red one ("one piece clip.stl") I thought it might have some teeth that grip a little better and ended up with the green one"one piece clip2.stl" and finally I thought enlarging the spring circle might help functionality so I came up with the yellow one "one piece clip3"
added some thicker v