The Serenity set is a made to measure size inclusive design, this means you take your own measurements before starting. This also means that you can make for any size and age. There are detailed steps and photos throughout to help guide you.
It’s written in English only using US terminology, and it’s an advanced beginner level.
You will need any type of 10ply yarn in as little or as much colours as you like. I used roughly 1500m of 10ply cotton for the sample size (UK 8). You will also need a 5mm crochet hook.