Flexible Cable Ties (various sizes)

thingiverse

I designed these cable ties to flex by adding a "W". Once you've coiled the cable/cord, just feed it through the opening where the cable ties overlap. To remove, just do the reverse. You can also pull back the outer part of the clip to expand the opening to let more of the cable in or out. I designed and uploaded multiple sizes. Hopefully there is a size that will work for your application.