MiMi: The friendship star is basically a nine patch, so the easiest method is to make it divisible by multiples of 3. You could either go with 27.5 or 30.5. I would go with the 30.5 because then you can easily make a 3.5 or a 6.5 inch block, plus the fame strip is easy to add. The strip for the 27.5 should be 1 inch and the 30.5 should be 2.5.