If you do a 10 x 10 square layout - (5.5 x 5.5 inch sewn size) - you would end up with a 55 x 55 inch top
If you do a 9 x 11 square layout - you would end up with a 49.5 x 60.5 inch top (this would use 99 squares)
If you do an 8 x 12 square layout - you would end up with a 44 x 66 inch top (this would use 96 squares)
the six inch cut squares "finish" to 5.5 (5-1/2) inches
so multiply 5.5 x (number of squares) to get a dimension
Or multiply 11/2 x (number of squares) to get a dimension