That's adorable! Because of the "nature" of the jelly roll quilt one dimension will be either 32" or 64" approx. That's 16 strips by 2 or 32 strips by 2". The width is determined by the number of inches you start with. 1600 inches, for instance, the first time it is folded it will be 800 inches, then 400 inches, then 200, then 100, then 50, give or take. I have combined two smaller ones to make it 48" (32 + 16) and am currently making two that will finish at 64" square. I am also making those in two parts and will sew them together. Hope this makes sense to you - Jean is our Jelly roll expert.