450 square inches is 30 x 15,which is actually only 3 inches wider than a 20 long.Add another 3 inches of width making it 30 x 18 instead,you'd get even more floor space at 540 square inches making it a massive difference in reality.32 x 20(roughly 80 cm x 50 cm)makes it 640 square inches.So really,it doesn't take a massive dimension change to have something bigger and better
