The bed specifications (for the large) state that is is 35 inches in diameter and 3.5 inches high.  It arrived folded in wedges into a tiny package, and has still not laid flat.  The plastic tubing that is supposed to hold the bed in a cave formation is twisted and doesnt hold up at all.  The foam in the bed is barely 30 inches in diameter, and not 2 inches thick.  The fabric is lovely, but the bed itself is useless.  Extremely disappointed in this product.  It is not even REMOTELY worth the cost.