Serta Foundation

A Supportive Foundation. A Higher Bed Profile. A Better-Finished Bedroom.

The Serta High Profile 9-Inch Box Foundation provides a sturdy, fabric-covered support base for a compatible mattress. Offered in Twin, Twin Long (Twin XL), Full, Queen, and King size options, this American-made foundation brings a traditional bed height to sleep setups at Mack's Mattress Megastore inside Gallery Furniture.

Whether completing a guest bedroom or refreshing a primary suite, a properly matched foundation gives the mattress an even support surface without changing the mattress's selected comfort level.

Why Choose the Serta High Profile 9-Inch Box Foundation:

9-inch high profile: Adds 9 inches beneath the mattress for a taller bed setup. Overall bed height also depends on the mattress and frame.

Wood construction: A wood support structure and fabric cover create a stable base for a compatible mattress.

Reinforced support: Reinforced edges and center support help distribute the mattress load across the foundation.

Five size options: Choose Twin, Twin Long (Twin XL), Full, Queen, or King. Check the selected option for current availability.

Twin dimensions: 38 inches W × 75 inches L × 9 inches H.

Twin Long / Twin XL dimensions: 38 inches W × 80 inches L × 9 inches H.

Full dimensions: 54 inches W × 75 inches L × 9 inches H.

Queen dimensions: 60 inches W × 80 inches L × 9 inches H.

King setup: Two matching Twin XL foundations support a standard King mattress. Confirm the King option's set contents before ordering; a single Twin XL foundation is not a complete King set.