This wider knot is both expandable and adjustable. By adding additional passes of material it will maintain it's approximate size and dimensions. By working up the knot to it's natural finished state it will decrease in diameter as the gaps in the weave are reduced.
Made from 2 mm synthetic cord
Find a rope bracelet like this in one of these shops:
WhatKnotShop on Etsy
WhatKnotShop on Zibbet