I tried a lot of released bag clips, but most of them are only working with ABS material since it is more flexible.
So I tried to design a clip which also works with PLA.
I used a hinge instead of a spring mechanism. The Clip itself is designed to be printed as four shells to provide the necessary flexibility .

The hole thing is printed as one piece and should be came out nicely and moveable without any support material.

Bigger clips are following.

UPDATE 08.08.2015: Clip with 85mm Length added
UPDATE 17.12.2017: Clip with 125mm Length added
UPDATE 07.08.2019: Added Clips which are more closed to allow higher print density

-Optimized for a nozzle diameter of 0.4mm
-Shells: 2
-Infill: 30-40 % should be enough