20 Pack Single Hole Barrel Stopper Single Hole Spring Cord Locks Toggle Plastic Slider Fastener for 4mm Lanyard

I use these to hold 2mm elastic on masks. As indicated in the listing these are tiny/mini toggles, not standard larger sized, the hole in these is also tiny and work fine for 2mm or smaller cording when threading 2 cords through it, for a single cord nothing larger than 3 or 4mm will fit.

Smaller than regular size ones