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World Cup 2026 is coming to LA ―Get your Airbnb furnished & guest-ready

Foundations / Box Springs by Size

(132 products)
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    Ashley Furniture

    Low Profile Black King Foundation

    Sale price $329.00 Regular price $799.00 59% Off
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  • Free White Glove Delivery

    Tempur-Pedic

    Tempur-Pedic® Flat Foundation

    Regular price $255.00
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    Ashley Furniture

    Low Profile Black California King Foundation

    Sale price $329.00 Regular price $799.00 59% Off
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    Stearns & Foster

    Stearns & Foster® Flat Foundation

    Regular price $240.00
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  • Coaster

    Mercer Grey Split California King Low Profile Box Spring Foundation

    Sale price $319.00 Regular price $799.00 60% Off
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  • Coaster

    Mercer Grey Split California King Standard Box Spring Foundation

    Sale price $319.00 Regular price $799.00 60% Off
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  • Coaster

    Mercer Grey Split Eastern King Standard Box Spring Foundation

    Sale price $319.00 Regular price $799.00 60% Off
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  • Hollywood

    Emerge Gray Queen Upholstered Platform Foundation

    Sale price $299.00 Regular price $749.00 60% Off
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    Purple

    Purple Standard 9" Gray Twin Flat Foundation

    Sale price $299.00 Regular price $749.00 60% Off
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    Purple

    Purple Low Profile 5" Gray King Flat Foundation

    Sale price $530.00 Regular price $1,329.00 60% Off
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    Purple

    Purple Low Profile 5" Gray Queen Flat Foundation

    Sale price $399.00 Regular price $999.00 60% Off
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    Purple

    Purple Low Profile 5" Gray Full Flat Foundation

    Sale price $399.00 Regular price $999.00 60% Off
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    Purple

    Purple Low Profile 5" Gray Twin XL Flat Foundation

    Sale price $299.00 Regular price $749.00 60% Off
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    Purple

    Purple Low Profile 5" Gray Twin Flat Foundation

    Sale price $299.00 Regular price $749.00 60% Off
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    Purple

    Purple Standard 9" Gray Cal King Flat Foundation

    Sale price $530.00 Regular price $1,329.00 60% Off
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    Purple

    Purple Standard 9" Gray King Flat Foundation

    Sale price $530.00 Regular price $1,329.00 60% Off
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    Purple

    Purple Standard 9" Gray Queen Flat Foundation

    Sale price $399.00 Regular price $999.00 60% Off
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    Purple

    Purple Standard 9" Gray Full Flat Foundation

    Sale price $399.00 Regular price $999.00 60% Off
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    Purple

    Purple Standard 9" Gray Twin XL Flat Foundation

    Sale price $299.00 Regular price $749.00 60% Off
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    Purple

    Purple Low Profile 5" Gray Cal King Flat Foundation

    Sale price $530.00 Regular price $1,329.00 60% Off
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  • Bellona

    Carlino Gray Queen Foundation

    Sale price $759.00 Regular price $2,099.00 64% Off
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  • Coaster

    Mercer Grey Low Profile Box Spring Foundation

    Sale price $319.00 Regular price $799.00 60% Off
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    Stearns & Foster

    Stearns & Foster® 2019 SF SX4 High Profile Queen Foundation

    Regular price $299.00
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Which Size Foundation or Box Spring Do You Need?

Your foundation must match your mattress dimensions exactly. A mismatched base creates uneven support, causes premature mattress wear, and can void your mattress warranty. Use the table below to confirm your size:

Size

Dimensions

Best For

Twin

38" x 75"

Kids, guest rooms, bunk beds

Twin XL

38" x 80"

Teens, tall sleepers, split king

Full

54" x 75"

Solo adults, studios, guest rooms

Queen

60" x 80"

Couples, master bedrooms

King

76" x 80"

Spacious master suites, split option

Cal King

72" x 84"

Tall sleepers, narrow rooms

Split Box Springs for Easier Delivery

King and California King foundations can be difficult to maneuver through narrow hallways, staircases, and doorways. A split box spring solves this by dividing the base into two pieces that fit through tight spaces and reassemble on the bed frame. Queen-size split box springs are also available for homes with particularly narrow access. Once assembled, a split foundation performs identically to a single-piece base.

Choosing the Right Profile Height

Every size in our collection is available in low, standard, and high profile options. The right height depends on your bed frame and desired mattress surface height. Compare all three profiles in our foundations by height collection.

Pairing a Foundation with the Right Mattress

Once you have selected your foundation size, make sure you pair it with a compatible mattress. Memory foam and hybrid mattresses work best on rigid foundations, while innerspring mattresses are compatible with both foundations and traditional coil box springs. Browse our mattresses by size to find matching options.