This pattern is by Heathermaid and has small med and large sizes. It is a sampler pattern, where you can do as much or as little work as you like, the repeats are simple and not very long, so it is easy to remember where you are. If you have never done fair Isle this is a great intro.
You can use yarn scraps or a shaded yarn for your fair isle.
It is all done in 8 ply