I’m not familiar with the pattern, but math wise I think one should work. 60*60= 3600 square inches. A layer cake is 42 10 inch squares. 10*10=100*42=4200 square inches. This doesn’t account for seam allowances and waste. I can’t give you that because of my unfamiliarity with the pattern. You could always get two ant use the second as a border if you don’t need it.