good morning Leila.He is definitely magnificent. You calculate the size you will need by dividing the number of stitches by 14. If the number of stitches across is 140, you will need 10" of material. Do the same for the length. I am not sure if you will be able to find perforated paper large enough to fit him. I frequently us the paper for small things such as the Christmas sleds and have never seen any perforated paper larger than 10 x 12. Good luck