The techniques used in this pattern are called double crochet and slip stitch as well as single crochet. The vest is crocheted with a 5 mm crochet. Adjusting your crochet hook size can assist you in reaching the pattern’s required gauge or switching hook style or brand can help as well. About 500 grams of MYO’s Basic Wool (650 m) was used for the size in the picture (Medium). The width of the vest is approx. 46 cm and the height approx. 47 cm. In addition to a crochet hook and yarn, you will need a tape measure and markers.