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Serta Classic Mattress - Standard Firm

Serta classic dorian firm mattress sitting in a beige bed frame ||feel: firm||level: standard Corner of Serta classic dorian firm mattress sitting in a beige bed frame ||feel: firm ||level: standard

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Serta Five Star Mattress - 12" Firm

12 inch firm mattress in a blue bedframe with a Serta sheep with a number on top of it with the Serta packaging to the right of the bed Image of a Serta sheep foot stepping on a Serta mattress showing the Firm size.

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Mattress-in-a-Box

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Serta Classic Mattress - Enhanced Firm

Serta classic brecon firm mattress sitting in a beige bed frame ||feel: firm ||level: enhanced Corner of Serta classic brecon firm mattress sitting in a beige bed frame ||feel: firm ||level: enhanced

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Serta Perfect Sleeper X Quilted Hybrid Mattress - Level One Firm

Perfect Sleeper X Quilted Hybrid Knox Firm Mattress sitting in a brown bedframe || feel: Firm || level: Level 1 Corner of Perfect Sleeper X Quilted Hybrid Knox Firm Mattress sitting in a brown bedframe || feel: Firm || level: Level 1

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Serta iComfort Mattress - Standard 11.5" Firm

iComfort Elana Firm Mattress sitting in a brown bedframe || feel: firm || level: Standard - 11.5" Corner of a iComfort Elana Firm Mattress sitting in a brown bedframe || feel: firm || level: Standard - 11.5"

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Perfect Sleeper Innerspring Mattress Cascade Canyon Firm 13”

A Serta Perfect Sleeper firm mattress on a wooden bed frame in a styled bedroom setting, with a circular orange 'Real Simple Smart Sleep Awards 2026' badge in the top-left corner. Serta Perfect Sleeper firm mattress on a wooden bed frame with pillows in a bedroom setting

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Perfect Sleeper Innerspring Mattress Cascade Range Firm Pillow-Top 14.5"

Serta perfect sleeper firm mattress on a bed in a bedroom setting with neutral decor. Serta perfect sleeper firm mattress with decorative cover on a bed in a bedroom setting

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Serta® iSeries® NXG™ Mattress - 3500 Hybrid Firm

A Blue Serta® iSeries® NXG™ Mattress shown on a wooden bed frame in a styled bedroom setting, featuring a blue and white patterned bedding cover, two pillows, bedside tables, and a circular award badge overlay. Serta iSeries NXG 3500 Hybrid Firm mattress with layer diagram and features on a blue background

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Serta iComfortPro Mattress - Level Two Firm

iComfortPro Ambrose Firm Mattress sitting in a brown bedframe || feel: firm || level: Level 2 Corner of iComfortPro Ambrose Firm Mattress sitting in a brown bedframe || feel: firm || level: Level 2

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Serta Perfect Sleeper X Hybrid Mattress - Level Two Medium Firm

Perfect Sleeper X Hybrid Prescot Medium Firm Mattress sitting in a brown bedframe || feel: Medium Firm || level: Level 2 Corner of Perfect Sleeper X Hybrid Prescot Medium Firm Mattress sitting in a brown bedframe || feel: Medium Firm || level: Level 2

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Serta® iSeries® NXG™ Mattress - 1500 Hybrid Firm

A Blue Serta® iSeries® NXG™ Mattress on a wooden bed frame in a styled bedroom setting, featuring a blue patterned bedding cover, two pillows, a blue wall, and a 'Bedding Good Housekeeping Winner Awards' badge overlay. Serta iSeries NXG 1500 Hybrid Firm mattress with features highlighted on a blue background

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Mattress

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Serta Five Star Mattress - 14" Firm

Serta Five Star 14 inch firm mattress with packaging and 'Made in the U.S.A.' label in a bedroom setting. Close-up of a Serta Sheep's foot on a blue Serta 5 Star MIB mattress, featuring text stating built for those who prefer a more stable sleep surface. A strong, lifted sensation complimented by just a touch of give.

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Perfect Sleeper Innerspring Mattress Cascade Range Extra Firm 14”

A Serta perfect sleeper plush mattress with a pattern matching upholstered base in a styled bedroom scene, with two green nightstands, lamps, pillows, and a gray wall. An orange circular badge in the upper left reads 'REAL SIMPLE SMART SLEEP AWARDS 2026. Serta perfect sleeper plush mattress on a bed in a bedroom setting with a nightstand and lamp.

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Serta Perfect Sleeper X Hybrid Mattress - Level One Firm

Perfect Sleeper X Hybrid Aspen Firm Mattress sitting in a brown bedframe || feel: firm || level: Level 1 Corner of Perfect Sleeper X Hybrid Aspen Firm Mattress sitting in a brown bedframe || feel: firm || level: Level 1

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Serta Perfect Sleeper X Quilted Hybrid Mattress - Level Two Firm Pillow Top

Perfect Sleeper X Quilted Hybrid Max Firm Pillow Top Mattress sitting in a brown bedframe || feel: Firm Pillow Top || level: Level 2 Corner of Perfect Sleeper X Quilted Hybrid Max Firm Pillow Top Mattress sitting in a brown bedframe || feel: Firm Pillow Top || level: Level 2

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Serta iComfortPro Mattress - Level Three Firm

iComfortPro Kingston Firm sitting in a brown bedframe || feel: Firm || level: Level 3 Corner of iComfortPro Kingston Firm Mattress sitting in a brown bedframe || feel: Firm || level: Level 3

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Serta® iSeries® NXG™ Mattress - 1500 Firm Foam

Blue Serta iSeries NXG mattress on a wooden bed frame with a dark blue wall and white pendant lights. Serta iSeries NXG 1500 Luxury Firm mattress with layers and features highlighted on a blue background

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Mattress

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Serta Perfect Sleeper X Quilted Hybrid Mattress - Level One Extra Firm

Perfect Sleeper X Quilted Hybrid Excelled Extra Firm Mattress sitting in a brown bedframe || feel: Extra Firm || level: Level 1 Corner of Perfect Sleeper X Quilted Hybrid Excelled Extra Firm Mattress sitting in a brown bedframe || feel: Extra Firm || level: Level 1

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Serta Perfect Sleeper Pro Mattress - Level Two Firm

Perfect Sleeper Pro Geneva Firm mattress sitting in a brown bedframe || Level: Level 2 || Feel: Firm Corner of Perfect Sleeper Pro Geneva Firm mattress sitting in a brown bedframe || Level: Level 2 || Feel: Firm

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Serta iComfortPro Mattress - Level One Extra Firm

iComfortPro Granby Extra Firm Mattress sitting in a brown bedframe || feel: extra firm || level: Level 1 Corner of iComfortPro Chelsea Extra Firm Mattress sitting in a brown bedframe || feel: extra firm || level: Level 1

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Masterpiece™ Handcrafted by Serta® Grand Exhibit Luxury Firm Pillow Top

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Masterpiece™ Handcrafted by Serta® Grand Exhibit Luxury Firm Pillow Top Masterpiece™ Handcrafted by Serta® Grand Exhibit Luxury Firm Pillow Top

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Masterpiece™ Handcrafted by Serta® Exhibit Firm

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Masterpiece™ Handcrafted by Serta® Exhibit Firm Masterpiece™ Handcrafted by Serta® Exhibit Firm

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Shop by size

Twin

74.5" L x 38" W

Best for kids, day beds, bunk beds or limited sleeping space.

Shop Twin

Twin XL

79.5" L x 38" W

Best for taller kids, dorm rooms or those with a split king set up.

Shop Twin XL

Full

74.5" L x 53" W

Best for young adults, a first apartment or a guest bedroom.

Shop Full

Queen

79.5" L x 60" W

Best for couples or single sleepers who like space to roll around.

Shop Queen

King

79.5" L x 76" W

Best for couples who like their own space to spread out or share a bed with children/pets.

Shop King

Cal King

83.5" L x 72" W

Best for taller people, people who share the foot of their bed with pets, or have a narrow bedroom.

Shop Cal King

Size Guide

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FAQs

Who should choose a firm mattress?
Firm mattresses are ideal for sleepers who prefer a stable, lifted feel with minimal sink. They are a popular choice for back and stomach sleepers and can also work well for heavier sleepers who want extra support and durability. Expect strong support with a touch of cushioning for comfort.
Does firm mean hard?
No. Firm means more support and less sink, not a rock-hard surface. Many firm Serta® mattresses add cushioning above the support layer, and a new mattress can take up to 45 days to settle in.
Can side sleepers sleep on a firm mattress?
Yes, if that's what feels most comfortable to you. However, side sleepers typically benefit from more cushioning to help relieve pressure on the shoulders and hips. If you prefer a firm mattress, consider a firm pillow top or firm hybrid for added pressure relief, or explore a medium mattress for a balance of comfort and support.
What's the difference between firm and medium-firm?
Firm mattresses offer a more supportive feel with minimal cushioning. Medium-firm mattresses add an added layer for extra cushioning. Which creates a gentle cradle around your body while still providing strong support. Choose firm if you want maximum push-back, or medium-firm if you prefer a little more pressure relief and contouring.
Should I choose a firm innerspring or a firm hybrid?
An innerspring gives responsive, "on the bed" support. A hybrid adds foam for contouring comfort on top of that support. This page has both: Perfect Sleeper® Innerspring models like the Cascade Canyon Firm 13", and hybrids like the iSeries® NXG™ 1500 Hybrid Firm. Compare them on Shop by Mattress Type.
Does Serta make a firm mattress in a box?
Yes. Five Star mattresses are available in firm in 12" and 14" heights, and several are marked Quick Ship.
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