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King-Size
Mattresses

The Original Mattress Factory offers a wide selection of hand-built king-size mattresses. King-size mattresses are 76 inches x 80 inches (± 1 inch). Our king-size mattresses are available in 15 innerspring and three foam models, including two-sided and one-sided models and in comfort levels from soft to hard. We highly recommend you pair your new mattress with a real working box spring, as well as a heavy-duty frame that features a center rail for support. Split box springs come standard on all king-size mattress sets. If you have concerns about being able to easily get in and out of bed due to the height of the mattress, you may want to consider a low-profile box spring. All OMF king-size innerspring mattresses are hinged to enable you to fold the mattress for easy transport.

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  • Mattress Size: Twin or California King
  • Product Line: Orthos
  • Product Type: Set or Box Spring
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Picture of Orthōs Extra Firm Mattress Set Product

Orthōs Extra Firm Mattress Set

10.5-inch ultra-premium quality innerspring mattress set hand built with a two-sided design and hard feel.

King: $1,787.00
Orthōs Luxury Firm Mattress Set Product

Orthōs Luxury Mattress Set

12.5-inch ultra-premium quality innerspring mattress set hand built with a two-sided design and medium feel.

King: $1,787.00
Orthōs Ultra Firm Mattress Set Product

Orthōs Ultra Firm Mattress Set

12.75-inch ultra-premium quality innerspring mattress hand built with a two-sided design and our hardest feel.

King: $2,087.00
Orthōs Ultra Plush Top Mattress Set Product

Orthōs Ultra Plush Mattress Set

14.25-inch ultra-premium quality innerspring mattress hand built with a two-sided design and soft feel.

King: $2,087.00
Orthōs Pillow Top Mattress Set Product

Orthōs Pillow Top Mattress Set

12.5-inch ultra-premium quality innerspring mattress hand built with a two-sided EuroTop design and medium feel.

King: $1,957.00
Orthōs ultra pillow top (formerly Orthopedic Premier Super Pillow Top) mattress set Product

Orthōs Ultra Pillow Top Mattress Set

16-inch ultra-premium quality innerspring mattress hand built with a two-sided EuroTop design and soft feel.

King: $2,277.00
Orthos box spring Product

Orthōs / Opulence Box Spring

Real working modular box spring with more wire and an additional wood slat for superior support and shock absorption to help extend the life of the mattress.

King: $618.00