It’s true dimensions are the drip line of the roof, not the shed itself. The shed itself is actually 4 1/2’ by 5 1/2’.  Make sure it doesn’t get wet when assembling, the numbers wash off. It had started to rain as we put it together.  Once the first wall is assembled and you get the hang of it, it goes together more quickly. Did take a better part of the afternoon to assemble.