Prism99

The blocks I can figure out. 96" x 108", made up of 12" blocks, is 8 blocks x 9 blocks = 72 blocks for the original quilt. A 6" border on each side is equal to a single 12" block. Therefore, the new quilt of the same size with a 6" border would be 7 blocks x 8 blocks = 56 blocks for the new quilt.

Have to have another cup of coffee before tackling the yardage.

Edit: Okay, 56/72 = .7777. This means the new quilt blocks comprise about 80% of the old quilt blocks. You can take 80% of the old yardage to figure out the new yardage requirements.

80% of 7.25 yards = 5.8 yards. You could round down to 5-3/4 yards because 80% is a little more than 77%; however, without knowing the number and shapes of the individual pieces, it is safer to round up to 6 yards.

80% of 3.75 yards = 3 yards. For the same reasons as above, I would round up to 3-1/8 yards or 3-1/4 yards.

More coffee needed before I add the border fabric.

Edit 2: I am calculating an additional 2 yards of fabric for the border assuming the 6" strips are cut WOF and pieced to length. Hopefully someone else will check those calculations, as I do not trust my brain at this point.