These were my carts yesterday as I laid out a balcony box design for a Printer's Row high rise. The pair of planter boxes I'll be filling are 36" long, as are these carts. Perfect for lining up a design so you can visualize it in your space. Once I lay out the design I like, I make a planting schematic and take a digital picture. That way, once I get the plants out of the car at the site it's easy to remember my plan.