We use the 4 x 6 combination (12 piece). There is so much space to grow a couple tomatoes, zucchini and carrots. We like it because it's unique and no one around has one. It's better than the water trough because it has no bottom and you don't have to drill drain holes. We love the olive green. As all of our other raised beds start to deteriorate, will eventually will replace them all with the vego garen