I made one at our last retreat. I must admit I was intimidated at first but one of the more professional quilters took me under her wing and showed me step by step. It was awesome. At first I thought "I will never do a second one" and before I was done with it I had another one in mind. It turned out beautifully. Used her ruler so not sure what size. she had me keep them in order by stacking them in two piles and it worked out perfectly. Wish I could post a picture and may have someone help me with that so that you can see a not so advanced quilter can do it.