Hi Samantha, This inflatable's size when folded up is dependent on how it is rolled or folded, and how tightly it is rolled or folded. If you are squeezing out the excess air, it can be rolled up like a sleeping bag to be fairly compact for storage. In general, this item ships in a box that measures at 16 x 16 x 28 inches. It is machine rolled, so it is difficult to get it rolled that tightly by hand, but that should give you an idea of its general size when it is rolled or folded for storage. I hope that helps! Sincerely, Blast Zone Support