The pattern size is completely customizable. The branches are crocheted in separate tiers, then sewn together. Just crochet the number of branch tiers needed to obtain the size you want. Amount of yarn needed depends on size desired and yarn used. I used a bit more than 2 skeins of Bernat Blanket Big Ball to make 10 branch tiers for the front and back panels.

You also have the option to add snow or ornaments for decoration.