01Where to Buy a ¾ Size Mattress — Your Complete Guide

A ¾ size mattress measures 48 inches wide by 75 inches long — wider than a twin, narrower than a full. It's a niche size that most big-box stores don't stock, which makes finding one trickier than it should be.

This guide covers exactly where to look, what to expect, and how to pick the right one.

03What Is a ¾ Size Mattress?

The ¾ mattress (also called a three-quarter) sits between a twin and a full:

Size Width Length
Twin 38" 75"
¾ (Three-Quarter) 48" 75"
Full 54" 75"
Queen 60" 80"

It gives you 10 extra inches of width over a twin — enough to make a real difference for a growing kid or a single adult in a tight room.

04Who Actually Needs One

  • Antique or vintage bed frame owners — Many pre-1950s frames were built for this exact size. Forcing a full or twin into them won't work well.
  • Small bedroom setups — When a full is just a few inches too wide for the room layout.
  • Teenagers who've outgrown a twin — More sleeping space without committing to a full-size bed.
  • RV or cabin builds — Custom sleeping quarters sometimes call for non-standard dimensions.

Not ideal for: Couples (too narrow), adults over 6' (same length as a twin), or anyone who wants a standard sheet selection.

05Where to Buy a ¾ Size Mattress

1. LA Mattress Store (Best for In-Person Testing)

With 5 showrooms across Los Angeles, LA Mattress Store is one of the few local retailers where you can actually feel a mattress before buying. Staff can help you navigate size options and find the closest match if a true ¾ isn't in stock — or point you toward a custom solution.

Benefits of buying local:

2. Custom Mattress Manufacturers (Best for Exact Fit)

If you have a vintage frame with unusual dimensions, a custom mattress maker is often the right call. You provide the measurements, they build to spec.

Two reputable options:

  • Custom Comfort Mattress — California-based, good range of materials
  • Mattress Insider — Online ordering, wide selection of foams and firmness

Expect to pay a premium (typically 20–40% more than standard sizing) and allow 2–4 weeks for production.

3. Online Retailers (Widest Selection)

Amazon, Wayfair, and specialty foam retailers carry ¾ size options, though inventory varies. Filter by exact dimensions before ordering. Always check:

  • Return policy and trial period
  • Shipping method (compressed roll vs. white-glove)
  • Customer reviews for durability after 12+ months

The downside: you can't test it first, and returns on bulky mattresses can be cumbersome.

4. Specialty Mattress Stores

Stores like Mattress Firm may carry or be able to order ¾ sizes depending on location. Call ahead — don't assume they stock it.

06How to Choose the Right ¾ Mattress

Match Your Sleep Position to Firmness

Sleep Position Recommended Firmness Why
Side sleeper Soft to medium-soft Cushions shoulders and hips
Back sleeper Medium to medium-firm Supports lumbar curve
Stomach sleeper Firm Prevents hips from sinking
Combination sleeper Medium Versatile for position changes

Pick Your Material

  • Memory foam — Best pressure relief, good motion isolation, can sleep warm
  • Hybrid — Balanced support, better airflow than all-foam, slightly bouncier
  • Latex — Durable, naturally cooling, responsive feel — good for allergy sufferers
  • Innerspring — Traditional feel, breathable, less contouring

Check Frame Compatibility

A ¾ mattress needs to sit on a proper foundation. A standard twin or full base won't work well. If you're working with an antique frame, measure the interior sleeping area (not the frame's outer edge) before ordering.

Budget Guidance

Budget Tier Price Range What to Expect
Entry $200–$500 Basic foam or innerspring
Mid-range $500–$1,000 Quality hybrid or memory foam
Premium $1,000+ Luxury materials, custom options

07Recommended Mattresses Available in ¾ Size

Tempur-Pedic TEMPUR-ProAdapt Soft

The ProAdapt Soft uses TEMPUR-ES comfort foam layered over an APR support core — a genuinely premium feel. It's one of the few luxury brands that can accommodate custom sizing through authorized dealers.

Pros Cons
Exceptional pressure relief and body contouring High price point
Durable — typically lasts 10+ years Sleeps warmer than hybrid options
Adjustable base compatible May be too soft for stomach sleepers
Removable, washable cover

View the Tempur-Pedic ProAdapt Soft

Eclipse Cares Peacefulness Hybrid 12" Plush

A solid mid-range hybrid with individually wrapped coils and plush foam layers. Good motion isolation, strong edge support, and a comfortable plush feel without the premium price.

Pros Cons
Good balance of support and plush comfort Not ideal for very firm sleepers
Strong edge support Less body contouring than all-foam
Good motion isolation for a hybrid

View the Eclipse Cares Peacefulness Hybrid

Lily Firm Gel Memory Foam by Diamond Mattress

Best for back and stomach sleepers who want firm support with temperature management. Gel memory foam keeps things cooler than traditional foam options.

Pros Cons
Firm support with gel cooling Too firm for side sleepers
Promotes spinal alignment Less motion isolation than plush foams
Durable tight-top construction

View the Lily Firm by Diamond

08Frequently Asked Questions

What exactly is a ¾ size mattress?

A ¾ mattress is 48 inches wide by 75 inches long — between a twin (38") and a full (54") in width, and the same length as both.

Why would I need a ¾ size instead of a full?

Mainly because of your bed frame. Many antique and vintage frames were built to ¾ dimensions. A full mattress (54" wide) won't fit properly in them. A twin (38" wide) leaves a 10" gap.

Where can I actually buy one in Los Angeles?

LA Mattress Store's 5 LA showrooms are your best starting point for in-person help. Custom manufacturers (Custom Comfort Mattress, Mattress Insider) can build to spec. Amazon and Wayfair also carry some options online.

Are ¾ size sheets easy to find?

Harder than standard sizes. Some retailers carry them, and custom linen companies can make fitted sheets to size. Factor this into your decision — ongoing bedding costs add up.

Can I use an adjustable base with a ¾ mattress?

Yes, if the mattress material supports it (memory foam and latex do well). Check with your retailer about base compatibility before purchasing.

What's a ¾ size mattress good for?

Antique frames, small guest rooms, growing kids who've outgrown a twin, and custom RV or cabin builds where space is tight.

How much does a ¾ mattress cost?

Expect $200–$500 for entry-level, $500–$1,000 for quality mid-range options. Custom-made mattresses typically run 20–40% more than equivalent standard sizes.

Do I need to test a ¾ mattress before buying?

Testing is always better when you can. Visit an LA Mattress Store showroom to test comparable firmness levels in person. If buying online, look for a generous trial period (90+ nights) with a straightforward return process.

How do I maintain a ¾ size mattress?

Rotate every 3–6 months, use a quality mattress protector, and follow the manufacturer's care instructions. Avoid jumping on the mattress to preserve its structure.