Was supposed to be 13.5" but it's more like 12" including the legs (it JUST lines up w my 12" high adjustable base) - I was hoping it would be slightly taller bc I prefer my mattress to sit "in" the frame just a tad but overall it's not terrible.  Easy to install and fits around my king size adjustable base. My headboard is being installed next week (wall panels) so I needed something that didn't come with a headboard - this fits the bill. Overall the quality and charcoal color were great, just wish the description was more accurate in regards to the height. Too much of a hassle to return it otherwise I might have