What size box does the Layla Foundation ship in? Layla January 23, 2019 04:17 Updated Follow Each Layla Foundation in sizes Twin through King ships in a box with the dimensions: 76”x11”x11”. The Cal King Foundation ships in a box with the dimensions 80”x13”x12” Related articles What Size Box does the Layla Mattress ship in? What size box does the Layla Bed Frame ship in? Is the Layla Foundation difficult to assemble? Comments 0 comments Please sign in to leave a comment.