The Marilyn Cardi is a made to measure and size inclusive pattern, this means you measure yourself and then follow the instructions. This means it can be made for any size and age.
The pattern uses US terminology and is an advanced beginner level; however, I have provided detailed steps, pictures throughout and stitch graphs.
You will need any type of 4ply (fingering weight) cotton yarn and a 3mm crochet hook. You can use thicker yarn with a bigger hook size if you prefer but just be aware your gauge will be different. I used roughly 400g/1050m of yarn for the sample size which is a UK 8 size small.