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Best Soft Mattress-in-a-Box 2024
Consumer Reports
Featured on Consumer Reports
Mattress Advisor
Best Mattress For Combination Sleepers 2024
Best Mattress For
Back Pain 2024

Shop Split King Size Puffy Mattresses

Split King Mattress Size Guide

A split king is two twin XL size mattresses side by side. Twin XL dimension: 38 inches wide and 80 inches long. Split king total dimension: 76 inches wide and 80 inches long.
Mattress size and dimensions guide
Mattress size and dimensions guide

Mattress Sizes And Dimensions Chart

Find the dimensions of all standard US mattress sizes below.
Mattress Size Dimensions in Inches Dimensions in Centimeters
Twin 38” x 75” 96.5 x 190.5
Twin XL 38” x 80” 96.5 X 203
Full 54" X 75" 137 X 190.5
Queen 60" X 80" 152 X 203
King 76" X 80" 193 X 203
California King 72" X 84" 183 X 213
Split King 76" X 80" 193 X 203

Why Buy A Split King Size Mattress?

A split king size bed is ideal for sleep partners who want to customize their individual sleep experience with added toppers, layers, and unique elevation settings when used alongside an adjustable base.
The Best of Both Worlds

The Best of Both Worlds

All the extra legroom of a twin XL, but with the width of a king size. The ultimate customized sleep experience.


A split king easily becomes two smaller twin XLs again, for guests, cozy movie nights, or anything else life throws your way.
Great for couples

Great for couples

Joining two twin XL mattresses together for a king size bed is a dream with a split base. Explore bases here.

Puffy Split King Size Memory Foam Mattress

Our all-foam option relieves pressure points and keeps you comfortable all night long.
The Original

Puffy Cloud Mattress

Rated America’s most comfortable mattress, this is Puffy’s original all-foam mattress featuring a dense layer of support foam topped with premium contouring and temperature regulation layers for cloudlike comfort with a medium-firm feel.

Shop Puffy Cloud
Puffy Mattress Split King Size

Puffy Split King Size Hybrid Mattresses

Looking for a hybrid split king? Our Puffy Lux and Puffy Royal combine the best of plush memory foam with the structured support of spring.
Puffy Lux Mattress Split King Size

Puffy Lux Mattress Hybrid

A consistent winner of best mattress awards, the Puffy Lux Hybrid with 8 distinct layers is our bestselling model. If you need a split king size mattress, a Puffy Lux Hybrid offers the best of both worlds: With more support than an all-foam, and medium plushness for a luxury feel, chronic aches and pains are no match for our Lux.

Shop Puffy Lux
Puffy Royal Mattress Split King Size

Puffy Royal Mattress Hybrid

With 10 distinct layers balancing plush softness and targeted support, the Puffy Royal Hybrid is our softest, most luxurious mattress. It features excellent cooling properties and fully zoned and responsive body contouring, for a consistent temperature and supported pressure points, all night long.

Shop Puffy Royal

Feels Like Sleeping on a Cloud

As with any Puffy mattress, the split king size option has been designed with the same quality and attention to detail. Our cloudlike plush feel might be the first thing you notice once you receive your Puffy, but that’s not the only feature that makes our sleep experience so luxurious:

Climate Comfort™

Climate Comfort™

Cooling Cloud™

Cooling Cloud™

Why Puffy is America’s Mattress

Puffy is Made in the USA and ranked America’s Most Comfortable Mattress.

We know nothing beats American innovation, so we’re passionate about manufacturing our mattresses right here, in the USA.

This innovation led us to develop a mattress that is the perfect balance of cooling and support. Your best night’s sleep is just a click away.

6 (More) Reasons to Choose a Puffy Split King Size Mattress

Sleep tight. 101 nights. Risk-free.

Test your Puffy risk-free with our 101-night sleep trial.


Mattress financing options as low as 0% APR with Affirm.

Warranty. For life.

Sleep soundly knowing every Puffy mattress comes with a lifetime warranty.

Free shipping. In 1 - 2 days.

Shipping is fast and free. Your order is dispatched in 1 - 2 business days.

Setup simplified.

We make setup easy. Just remove the box, unroll your mattress, and let it expand.

Made in USA.

Every Puffy mattress is designed and manufactured in the USA.


  • How big is a split king size mattress?

    The same size as a king size mattress (76” by 80”), a split king is made up of two twin XL mattresses that each measure 38 inches in width by 80 inches in length.

  • What is the difference between a split king mattress and a king size mattress?

    Though both king and split king mattresses have identical lengths and widths, a split king is two twin XL mattresses side-by-side whereas a king size mattress is one single mattress.

  • Which is the best split king size mattress?

    Sleepers who are looking for a versatile split king size mattress for both temperature regulation and steady support can’t go wrong with the bestselling Puffy Lux Hybrid. The combination of plush foam with sturdy coils makes this the ideal choice for sleepers with back pain or chronic aches. For sleepers who prefer an ultra-plush feel, the Puffy Royal Hybrid is an ideal choice. If an all-foam mattress with a medium-firm feel is what you’re after, the award-winning Puffy Cloud Mattress is also ideal.

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