Double Mattress

Double Mattress Dimensions: How Big Is a Double Bed?

A standard double mattress measures 138cm wide x 188cm long. It sits between a king single (107cm x 203cm) and a queen (153cm x 203cm) in width, but it's also 15cm shorter in length than both, which is worth noting for taller sleepers. A bedroom of around 8m² is the minimum to make it work comfortably. Head to our bed size guide to compare all sizes and find the right fit for your space. 

Who Is a Double Mattress Best For?

The right double mattress can make a genuine difference to how rested and ready you feel every morning, whatever your setup looks like. 

Teenagers and Young Adults

A double is a brilliant upgrade from a single for teenagers, giving growing bodies the space and support they need without taking over the room. It's a size that works through the uni years and beyond, making it a practical, long-term investment in better sleep and better days. 

Guest Bedrooms

A good guest room doesn't need a king. A quality double mattress gives your guests a sleep so good they might just start hinting about extending their stay. Don’t say we didn’t warn you.  Pair it with a solid base and quality bedding and you've done right by them.

Solo Sleepers in Smaller Spaces

If a queen won't comfortably fit, a double size mattress is the next best thing. You get the extra width over a king single without sacrificing floor space, making it a popular and practical choice for apartments and smaller bedrooms where great sleep still matters just as much.

Budget-Conscious Buyers

Because double mattresses use less material than queen or king sizes, they're typically 10 to 20 per cent less expensive for the equivalent model. For buyers comparing double vs queen mattress options on a tighter budget, that difference adds up without any compromise on the quality of your sleep. Finance options are also available if you’d rather spread the cost. 

Double Mattress Firmness Guide: Finding Your Right Feel

Choosing the right firmness is just as important as choosing the right size. Get it right and you will feel the difference every single morning. Here's how each level works across our double size mattress range:

Ultra Plush Mattress

The softest feel in the range, with deep cushioning comfort layers that cradle the body and melt away pressure points. Best suited to side sleepers and lighter body types who want maximum pressure relief and that cloud-like feeling from the moment they lie down.

Plush Mattress

Plush all the support, with a little extra luxury. A double mattress plush option works beautifully for side sleepers who want contouring comfort without the sensation of sinking too deeply, so you wake up cradled rather than swallowed up. 

Medium Mattress

The most versatile option across the range and a brilliant starting point if you are not sure where your preference sits and is the most common selection. A medium double mattress suits combination sleepers and those working through the options for the first time, offering balanced support and comfort across all sleep positions. 

Firm Mattress

A double firm mattress keeps hips level and the spine in a neutral position throughout the night, making it a strong choice for back and stomach sleepers and teenagers who need consistent posture support while they slumber.

Ultra Firm Mattress

Popular with those who enjoy a traditional firm mattress experience, it creates a stable, predictable surface that stays consistent no matter how much you move during the night.

Double Mattress Design and Materials

Knowing what's inside your mattress helps you buy with confidence and means you can care for it properly to get the most out of it for years to come. 

Pocket spring mattresses: Individually wrapped coils that move independently, so you get personalised support without being disturbed every time the person next to you shifts position. Durable, breathable and a reliable all-rounder for most sleepers. 

Memory foam double mattress: Responds to your body heat and pressure to mould closely around you, which means serious pressure relief and that deeply cradled feeling side sleepers love. 

Hybrid mattresses: Combine pocket springs underneath with foam or latex on top. You get the responsive support of springs with the contouring comfort of foam. A brilliant choice for sleepers who want it all and refuse to settle. 

Double Mattress Brands at Forty Winks

At Forty Winks, we stock a carefully curated range of leading brands in double size, including Sealy, King Koil, TEMPUR, Silent Partner, Crown Posture Bedding, MLILY, and Active Sleep. Some of these ranges are exclusive to Forty Winks, meaning you will not find them at any other retailer in Australia. 

Every brand we carry has earned its place, and our in-store sleep advisors know every range inside out so they can help you compare, try out and find the mattress that genuinely works for you. 

Not Sure Which Double Mattress to Choose? Try bedMATCH

Finding the right double mattress from a full range of brands, firmness levels, and materials can feel like a lot to work through on your own. That is where Forty Winks has a genuine advantage. As a proudly Australian, family-owned retailer with stores across the country and decades of sleep expertise behind us, we created bedMATCH exclusively for our customers. This clinically proven sleep diagnostic system takes 18 precise body measurements and runs over 1,000 calculations to match you to the right double mattress for your body type and sleep style. You try your matched options in store before you commit, so you walk out knowing you made the right call and that better sleep is already on its way. Find your nearest Forty Winks store and try bedMATCH today.