Shop Serta Twin Extra Long Mattresses

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Have a house full of tall kids? The Serta twin XL mattress, measuring 38" by 80", can help accommodate growing bodies. The extra length of a Serta twin XL mattress means your kids will have the space they need to get quality sleep, and the sturdy construction means you'll get many years of use. Give yourself and your family room to sleep and grow with a Serta twin XL mattress.

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  • MATTRESS FIRM EXCLUSIVE

    $347.00 - $497.00 $397.00 - $797.00 (up to 38% off)
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    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • FREE GIFT²

    $1,249.00 - $1,599.00 $1,299.00 - $1,999.00 (up to 20% off)
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    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • FREE GIFT²

    $1,749.00 - $2,099.00 $1,799.00 - $2,599.00 (up to 19% off)
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    All monthly payments are rounded up to the nearest whole dollar. +Monthly payment is based on minimum purchase price alone of $1.00, excluding tax and delivery charges, for 12 months at 0% APR*. Learn more.
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • FREE GIFT²

    $1,449.00 - $1,899.00 $1,499.00 - $2,399.00 (up to 21% off)
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    All monthly payments are rounded up to the nearest whole dollar. +Monthly payment is based on minimum purchase price alone of $1.00, excluding tax and delivery charges, for 12 months at 0% APR*. Learn more.
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • FREE GIFT²

    $399.00 - $699.00
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    All monthly payments are rounded up to the nearest whole dollar. +Monthly payment is based on minimum purchase price alone of $1.00, excluding tax and delivery charges, for 12 months at 0% APR*. Learn more.
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • FREE GIFT²

    $399.00 - $699.00
    financing
    Pay over  12 months!
    All monthly payments are rounded up to the nearest whole dollar. +Monthly payment is based on minimum purchase price alone of $1.00, excluding tax and delivery charges, for 12 months at 0% APR*. Learn more.
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • FREE GIFT²

    $449.00 - $749.00
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    Pay over  12 months!
    All monthly payments are rounded up to the nearest whole dollar. +Monthly payment is based on minimum purchase price alone of $1.00, excluding tax and delivery charges, for 12 months at 0% APR*. Learn more.
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • NEW AT MATTRESS FIRM

    $549.00 - $729.00
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    All monthly payments are rounded up to the nearest whole dollar. +Monthly payment is based on minimum purchase price alone of $1.00, excluding tax and delivery charges, for 12 months at 0% APR*. Learn more.
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • FREE GIFT²

    $599.00 - $999.00
    financing
    Pay over  12 months!
    All monthly payments are rounded up to the nearest whole dollar. +Monthly payment is based on minimum purchase price alone of $1.00, excluding tax and delivery charges, for 12 months at 0% APR*. Learn more.
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • FREE GIFT²

    $599.00 - $999.00
    financing
    Pay over  12 months!
    All monthly payments are rounded up to the nearest whole dollar. +Monthly payment is based on minimum purchase price alone of $1.00, excluding tax and delivery charges, for 12 months at 0% APR*. Learn more.
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • FREE GIFT²

    $699.00 - $1,099.00
    financing
    Pay over  12 months!
    All monthly payments are rounded up to the nearest whole dollar. +Monthly payment is based on minimum purchase price alone of $1.00, excluding tax and delivery charges, for 12 months at 0% APR*. Learn more.
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • FREE GIFT²

    $699.00 - $1,099.00
    financing
    Pay over  12 months!
    All monthly payments are rounded up to the nearest whole dollar. +Monthly payment is based on minimum purchase price alone of $1.00, excluding tax and delivery charges, for 12 months at 0% APR*. Learn more.
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH