The edges are single cord wrapped with two cored paired in the center which creates the wider rib.
The needle-weaving is simple over-under plain weave using the interstitial space as the crossover. The wrapping string is paired. The ends of the core cords are looped back under the center rib.
Sized on a mold this design is 7" (178 mm) circumference.
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Check the fiber+design section of WhatKnotShop on ETSY for this and a variety of similar designs.
design and photos copyright 2017