The Dog Bed Mattress Extender is a convenient way to extend your bedding to provide more sleeping room for you and your dogs. This kit will extend the length of your mattress and frame by approximately 25”, to give everyone a more comfortable sleep. This is done by adding a metal platform extender at the end of your bed. Sewed to the bottom of the dog bed is gripping material to provide stability between the dog bed and extender frame. This dog bed and metal platform extender is for animal use only. Accessories available, such as protectors and sheets, on my shop. The Kit Includes: A foldable metal platform extender to attach to the end (or side) of your bed, dimensions given below. Sits 14” tall (Add 14" to the desired height of your dog bed mattress to get the total height from the ground). A custom dog bed to fit on top of the extender and evenly fit your king mattress width. Foam Quality: Polyurethane foam, medium firmness Size of Dog Bed to fit the Extender Frame: King - About 25 ½” x 75 ½” x (Your Desired Height)" Foam Cover: This is a cozy polyester cover, with multiple color options. This is a zippered encased cover. Sewed to the bottom is 12"x12" Non Slip material (3 for king and 2 for queen-twin dog beds) Note: The frame is 14" tall, add the height of the dog bed to get your total height. Shipping: Everything will be shipped in two boxes. One will contain the dog bed roll packed, let sit for 24-48 hours to get its full form. The other box will contain the rest of the kit. Packages will be shipped within about 3-4 weeks of your purchase, as they are made to order. Packages may be received at different times. If you buy accessories with the kit, you may receive the accessories before the dog bed mattress extender.