I'm getting ready to start making some fall/halloween themed masks. I'm planning to use the 3D pattern but want better elastic. I was going to get the precut ties but they're all a bit short for using in a casing so I need to find the full lengths of elastic, but not flat elastic. I saw some round but it's about 1/8" and I want more like 1/4" wide and round, not flat. Soft so it doesn't hurt the ears.. Anyone know of which elastic cord would be like this (preferably at amazon).