Just a little FYI for those whom may not be addicted to sewing like I am :=)
2x4 grid = 28"x56" ------- 2x3 grid = 28"x42"
Most fleece is between 58"-60" wide. If you go with the 2x4, just make sure the fleece is not under 56" wide, than you could get away with 1 yard of fabric, which would be 36" x width of fleece. When ordering online you can't usually get anything other than whole yards, but at a fabric store they will cut fabric at 1/8" increments. 1/8 of a yard is 4 1/2". Can you tell I'm a sewer
So, as long as the fabric is wide enough then you only need to get 28" of it which would be 7/8 of a yard (31 1/2"). Buying 7/8 of a yard vs 1 whole yard might sound stupid to some, but when you are buying a lot of fabric, which I do often, it can add up quickly!
Buying 1 yard vs 7/8 of a yard
$10 per yard fabric vs 7/8 yard $8.75
$8 per yard fabric vs 7/8 yard $7.00
It may not look like much of a saving but if you are buying multiples your savings could add up quickly!
Easy math equation I use when heading to the fabric store to figure out how many 8ths I need.
A = inches needed....lets say 43" as an example
A divided by 4.5 = ## round up
43 divided by 4.5 = 9.55555 which is 10/8 of a yard or 1 1/4 yard