"How to make mountains from mole hills"
It's Dri Dek Rocket Science =
You start with four tiles snapped together forming a 24" X 24" mat. You trim ONE inch from one side and ONE inch from the side opposite where you just trimmed. You snap ONE of the trimmed away pieces to ONE of the untrimmed sides. BINGO, you have a new mat that is 22" X 25" and another piece 1" X 24" scrap to toss.
Your are now a DDRS.
BUT, this cutting method applies only to the bathrooms that don't have the new-style cabinet below the sink. Those floor dimensions are different.