King Single Mattresses

What Size Is a King Single Mattress?

The standard Australian king single size is approximately 107 x 203cm, or 1070 x 2030mm.

Dimensions can vary slightly between brands and models. Check the exact product specifications before you purchase a mattress, base or fitted accessories.

King Single vs Long Single

Both are around 203cm long. A king single is about 107cm wide, while a long single is around 92cm wide.

That extra 15cm can feel more comfortable if you move during the night or prefer more personal space. The elderly benefit greatly from the extra width so they can roll over from side to side safely. If width is tight, a long single may be the better fit.

King Single vs Double

Double mattresses is around 31cm wider, but a standard king single is approximately 15cm longer.

For a taller person sleeping alone, the extra length may matter more than the added width of a double. If two people will regularly share the bed, a double or queen is normally more practical.

Is a King Single the Same as a Twin XL?

No. A US Twin XL is also about 203cm long, but it is narrower than an Australian king single. Check dimensions carefully when shopping online for imported frames, sheets or accessories.

Is a King Single Big Enough for an Adult?

Yes. A king single provides a spacious area for one adult while keeping the bed footprint smaller than a double or queen.

It can work well for solo adults, taller sleepers, growing teenagers, students and spare rooms. It is designed for one person. Two adults may fit briefly, but 107cm can feel cramped for regular shared use.

Will It Fit in a Small Bedroom?

Measure the complete bed, not only the mattress.

A frame, headboard or adjustable base can extend beyond the mattress dimensions. Check clearance for doors, wardrobes and drawers, plus access through doorways or lifts.

How to Choose the Right Mattress

Choose the Feel

Different products have different comfort levels. Some people prefer a medium feel, while others prefer something softer or firmer.

There is no single firmness that suits everyone. Where possible, compare how different surfaces feel. Think about the initial feel, how it feels when changing position, and whether the surface stays comfortable through the night.

Compare the Construction

Mattress core options can include all-foam, innerspring, hybrid, latex and other specialised constructions. This collection includes several material and support systems designed to provide different comfort and performance characteristics.

Compare mattress depth, edge support, layers, breathability and durability. Some models may use cooling materials or gel-infused foams, so check the exact product if temperature comfort matters to you.

Check Your Bed Base

Not every mattress suits every base.

If you use an adjustable base, choose a mattress designed to flex safely with it and meet the manufacturer's compatibility requirements. Some products are designed for specific support surfaces, so check whether the model requires slats, a solid platform or another setup.

How Much Does a King Single Mattress Cost?

Prices vary by brand, construction, materials, depth, support system and intended use. Current prices are shown in this collection.

A lower-priced option may suit a spare room or occasional use. For a mattress used every night, compare comfort, materials, durability, warranty conditions and base compatibility as well as price.

If you need a complete bed, remember that the mattress and base may be separate purchases. Larger sizes such as queen, king or super king can also change the cost of the base, sheets and protectors.

Check current prices and stock availability before ordering online. Current product details are also available online.

Sheets and Protectors

Choose king single sheets and protectors sized for approximately 107 x 203cm. Standard single bedding is generally too short and narrow.

Also check mattress depth. Two products with the same width and length can still require different fitted-sheet pocket depths.

Can You Put the Mattress on the Floor?

Check the instructions for the exact product first.

Placing a mattress directly on a solid floor can reduce airflow underneath it. Moisture may become trapped between the mattress and floor, increasing the risk of dampness or mould in poorly ventilated spaces.

Some manufacturers may require a suitable base for warranty purposes. If a low sleeping height is important, discuss the intended setup before purchase.

Delivery, Setup and Trying Before You Buy

You can browse the mattress range, current prices and stock online before you buy online. For more complex needs, Life Changing Beds offers one-to-one fitting at its Hawthorn East showroom.

Pressure mapping may be used to compare pressure distribution across different surfaces. It is a decision-support tool and does not diagnose a condition or guarantee a medical result.

Delivery and installation depend on the product, delivery location and access at your location. Confirm the delivery scope before ordering, especially for apartments, stairs, lifts or complex access. Depending on the quoted delivery service, products may be delivered into the home, set up, checked and handed over rather than left at the front door.

If you are ordering online, ask how the product will be delivered, where delivery ends and whether installation is included. Confirm access before the product is delivered, especially for a multi-storey property or apartment.

Shop King Single Mattresses

A king single can offer great value when you want more width and legroom than standard single mattresses without moving to a double, queen, king or super king.

Shop single mattresses online and compare the mattress range by construction, medium feel or other feel options, support, prices and stock. If you are unsure which model suits your base, available space or preferences, book a free consultation with Life Changing Beds.

King Single Mattress FAQs

What size is a king single mattress?

In Australia, it is typically about 107cm wide x 203cm long.

Is a king single suitable for adults?

Yes. It can suit a solo adult who wants more room than standard single mattresses without moving to a double or queen.

Is a king single good for a spare room?

Yes. It can provide more sleeping space than standard single mattresses while preserving more floor area than larger sizes.

Can I use any mattress with an adjustable base?

No. The exact mattress must be compatible with the exact adjustable base.