I did some figuring and I feel that it would take most all of three jelly rolls to make this quilt as described in the directions which one can download. Everyone seems to think it will be 5x7 blocks but the directions one can print call for 6x8 blocks for a twin size. This would be 48 blocks. I may be wrong but if it were me I would allow three jelly rolls. If strips are a full 42 inches it allows for one more piece but if strips are forty that allows for one less when cutting. Hope this makes sense1