here. Each dot uses just over a metre/yard of yarn. The pattern uses a centre ring of three chain, but I've used a magic ring. It gives a bigger space to work in, while still finishing up with a neat centre. I learnt to do the magic ring when making amigurumi toys. I see when I investigate now that I've been making a double magic ring, which is fine. I'll continue to use it because it's stronger than the single version and the end doesn't have to be sewn in. Here is a tutorial for several ways of making a magic ring.