The pattern for the Mocktail vest is a pattern that is written on a made-to-measure kind of way, which means you can use your own measurements, and any size of yarn you want to make a vest that will fit you perfectly. The pattern has been tested for adult sizes and childrens sizes. The pattern uses beginner friendly stitches like single crochet, half double crochet, chain and double crochet. For this vest in a size XS/S, I used a total of 200 grams/ 360 meters of Hobbii their Mocktail yarn and a 5mm hook. But my testers proved that the pattern also works with other sizes yarn and hook.