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? Is the Layla Foundation difficult to assemble? Comments 0 comments Please sign in to leave a comment.