folia 731030 – Braided Cords, Opaque/Transparent, 30 Pieces Assorted in 10 Ideal for Braiding Bracelets, Keyrings, etc.

They are easy to use as they are not slippery, so can be made into a knot without slipping out of it, unlike others that I bought off Amazon. They are quite durable, the colours are nice and plan to make another order.