Did you notice how I did not write how much fleece in the materials list? That is because the amount of fleece you need will depend on the size of the person you are making the bag for. To determine how much fleece you need, measure how tall the person is, from the top of their head to their heel, and then add 6 inches. Now multiply that number by 2! By measuring from the top of the head and adding 6 inches, this should ensure plenty of wiggle room! Make sure when you purchase your fleece, it is in 1 long piece.