my sugestion is to lay the fabric out and figure out how large you want your borders to be then go from there. I like a 1.5 or 2 " inner border then larger 3 to 6 " outer borders. just my thoughts. once you know how large the borders are then you can figure our the fabric you need. but the first would probably be 1/2 yard and the rest 1 yard just to be on the safe cutting side so that you can have a bit of error room. (i do this from mistake experience) as you get to be a better quilter you can be more accurate in your fabric numbers. but this is just me.