Multiple Sizes Rubber band strap

This thin 3D printed strap is used with the help of rubber bands. I came up with this idea because I needed an adjustable strap for a yoga mat, but I did not feel like buying a strap material and using a buckle. I settled by printing thin PLA parts which are flexible to an extent and make a great strap when used in conjunction with a common household item (rubber bands). The cap that holds the two parts of the strap together is threaded so it is assembled fairly easily, additionally I was able to print it without supports with a fairly short print time.

There are three sizes as well as a Connector piece to allow for additional length.
-two small parts = 12cm + 12 cm - 2cm Overlap = 22cm long
-two medium parts = 16cm + 16 cm - 2cm Overlap = 30cm long
-two large parts = 20cm + 20 cm - 2cm Overlap = 38cm long
The connector piece is 20cm long and would be put in the middle of two of the other parts. Also, you can mix and match different sized parts to get more specific lengths.