Cherrie....I put some sizes into the electric quilt program for you and came up with this....
For a 84" X 92" queen size quilt without any borders you need 552 squares. Cut your squares 4 1/2 " for a 4" finished square.
For a 64" X 88" twin size quilt without borders you need 352 squares.
Cut your squares 4 1/2" for a 4" finished square.