This is simple cloth clip. 3d printable file attached. All parts in a single stl file. Should use strong and flexible materials to print it. 3d editable STEP file format also attached, you can edit it later. This is simple design. But can do more complex clip design. I didn't 3d print it. You have to check its workability.
Custom size and design possible. You have to contact with me for custom design. Aditional cost will be add for the custom design.
Thanks, Mahbub