king single bed dimensions

What Are King Single Bed Dimensions?

King single bed dimensions in Australia are typically 107 cm wide × 203 cm long for the mattress. In simple terms, a king single is wider and longer than a standard single, while remaining narrower than a double or queen.

The extra length is one of the biggest advantages. At 203 cm long, a king single offers the same mattress length as an Australian queen and king, making it a practical choice for growing teenagers, taller solo sleepers and compact guest bedrooms.

It is important to distinguish between mattress dimensions and bed-frame dimensions. The mattress is approximately 107 × 203 cm, but the complete bed can be larger once the headboard, side rails, footboard, upholstery or storage components are included.

Quick Facts

• Standard king single mattress: Approximately 107 × 203 cm
• Width: 107 cm
• Length: 203 cm
• Millimetres: 1,070 × 2,030 mm
• Approximate inches: 42 × 80 inches
• Typical use: Teenagers, adults, guest rooms and compact bedrooms
• Larger than: Standard single
• Smaller than: Double
• Same length as: Queen and King mattresses
• Important: Bed-frame dimensions can be larger than mattress dimensions

Why Are King Single Bed Dimensions So Popular?

The main reason Australians choose a king single is the balance between sleeping space and floor space.

A standard single mattress is approximately 92 × 188 cm, while a king single is approximately 107 × 203 cm. That gives the sleeper around 15 cm of additional width and 15 cm of additional length.

That difference can be particularly noticeable for a growing child or teenager.

A king single also makes sense for an adult who wants more length than a standard single but does not need the additional width of a double or queen.

In simple terms, king single bed dimensions provide adult-length sleeping space without requiring the floor area of a larger bed.

Standard King Single Bed Dimensions in Australia

These measurements refer primarily to mattress sizes. Individual mattress manufacturers can vary slightly, so always check the manufacturer's specifications before purchasing a frame or bedding.

King Single Bed Dimensions in CM, MM and Inches

For shoppers comparing specifications, the standard Australian king single is approximately:

• 107 cm wide
• 203 cm long
• 1,070 mm wide
• 2,030 mm long
• Approximately 42 inches wide
• Approximately 80 inches long

The 203 cm length is particularly useful for taller sleepers because it provides considerably more legroom than a standard single.

King Single Mattress vs Bed Frame Dimensions

One of the most common mistakes when planning a bedroom is assuming the mattress and bed frame have identical dimensions.

They do not necessarily.

A king single mattress occupies approximately 107 × 203 cm, while the complete bed frame may extend beyond those measurements.

A substantial upholstered bedhead, wide side rails, footboard or built-in storage can increase the overall footprint.

As a broad planning guide, some king single frames can be around 115–125 cm wide and approximately 213 cm long, but the actual size depends entirely on the design.

Always check the external dimensions of the specific bed frame, particularly when space is limited.

Types of King Single Beds

Standard King Single Bed

The simplest option consists of a king single frame and matching mattress.

This is ideal when you want maximum flexibility and a straightforward bedroom layout.

King Single Storage Bed

Storage drawers or compartments underneath the mattress can make excellent use of otherwise unused floor space.

They are particularly useful in teenagers' bedrooms, apartments and smaller homes.

Upholstered King Single Bed

An upholstered frame or bedhead can introduce softness and comfort while creating a stronger focal point.

Timber King Single Bed

Timber frames bring natural warmth and work across contemporary, Scandinavian, coastal and relaxed interiors.

Low-Profile King Single

A low-profile design can make a smaller room feel more open and visually spacious.

King Single With Trundle

Some designs incorporate a second mattress underneath, providing a practical solution for sleepovers or occasional guests.

How to Choose a King Single Bed

1. Measure the Room

Start by measuring the entire bedroom rather than simply identifying where the mattress will go.

Consider:

• Bed footprint
• Bedside tables
• Wardrobes
• Desks
• Doors
• Windows
• Walking paths
• Drawer and cupboard clearance

A mattress may fit perfectly on paper while the completed bedroom still feels cramped.

2. Measure the Bed Frame

Check the external dimensions, not just the advertised mattress size.

This is especially important for upholstered, storage and statement bed frames.

3. Consider Access

Think about how the bed will enter the room.

Measure doorways, hallways, staircases and lifts where necessary.

Large bedheads may need additional clearance during delivery.

4. Choose the Right Mattress

The mattress should correspond to the frame's specified king single dimensions.

Do not assume a mattress labelled “single” or “double” will fit.

5. Consider Mattress Depth

King single mattresses can vary considerably in thickness.

A deeper mattress can affect the overall height of the bed and may also require fitted sheets with suitable pocket depth.

6. Think Long Term

A king single can be a particularly practical choice for a growing child because the 203 cm length can remain useful well into the teenage and adult years.

Benefits & Use Cases

Teenagers

King singles provide more room than a standard single without taking up the floor area of a double.

Growing Children

The additional length can make the bed a longer-term purchase.

Taller Adults

The 203 cm mattress length provides useful additional legroom for solo sleepers.

Guest Bedrooms

A king single can provide comfortable accommodation without requiring a large room.

Compact Bedrooms

The narrower footprint compared with a double or queen leaves more room for wardrobes, desks and storage.

Student Accommodation

The combination of length and compact width can work well in rooms where floor space is limited.

Multifunctional Rooms

A king single can leave enough room for a desk, reading chair or storage furniture in a multipurpose bedroom.

House of Isabella Recommendations

When working with king single bed dimensions, consider the bed as the foundation of the entire bedroom.

A king single is particularly effective when paired with proportionate bedside furniture rather than oversized cabinets that consume valuable floor space.

For a smaller room, consider a streamlined timber or upholstered frame with integrated storage. This can reduce the need for additional furniture.

A soft neutral bedding palette can make the room feel spacious, while texture can be introduced through cushions, throws, rugs and artwork.

House of Isabella Australia offers a large in-stock catalogue of distinctive furniture and homewares, supported by fast delivery Australia-wide, East and West Coast warehouses and Australian-based customer care.

Buy Now, Pay Later options including Afterpay and Zip can provide additional flexibility on eligible purchases.

Collections such as Florabelle Collection, Zaffero, Emac & Lawton, Gallery Home, Café Lighting & Living and OneWorld Collection can also provide contextual inspiration when coordinating bedroom furniture and decorative accessories.

Trends for 2025 (Australia)

Multifunctional Storage

King single beds with drawers, lift-up storage or integrated shelving remained especially practical for compact Australian bedrooms.

Warm Timber

Natural timber tones continued to provide a relaxed, timeless foundation for bedrooms.

Upholstered Bedheads

Soft, upholstered bedheads introduced comfort and a boutique-hotel feeling without requiring excessive furniture.

Rounded Details

Curved edges, softly shaped headboards and rounded bedside tables helped create gentler bedroom interiors.

Neutral Bedding

Cream, beige, warm white, muted green and earthy tones created versatile bedrooms that could evolve as children grew.

Natural Textures

Linen-look fabrics, timber, woven accessories and tactile rugs added depth without overwhelming smaller rooms.

Long-Term Children's Rooms

Bedroom design increasingly favoured furniture that could transition from childhood through the teenage years rather than heavily themed pieces that quickly become outdated.

Styling Advice

Give the Bed Room to Breathe

Avoid pushing too much furniture around a king single bed.

Leaving clear visual and physical space around the bed can make the room feel larger.

Choose Proportionate Bedside Tables

A narrow bedside table may work better than a large cabinet in a compact bedroom.

Use a Larger Rug

A rug extending beyond the sides of the bed can visually anchor the sleeping area.

Add Vertical Storage

Wall shelves and tall storage can provide useful capacity without consuming as much floor space.

Layer the Bedding

Start with a fitted sheet, then add a quilt or doona cover, blanket and a restrained selection of cushions.

Keep Colours Cohesive

A simple palette makes it easier to mix furniture and décor without making the room feel cluttered.

King Single vs Single

The standard single is approximately 92 × 188 cm, while a king single is approximately 107 × 203 cm.

That means the king single adds:

• 15 cm in width
• 15 cm in length

For a growing child or taller sleeper, this extra space can make a noticeable difference.

A single is generally better when floor space is the highest priority, while a king single provides a more generous sleeping surface and longer usable lifespan.

King Single vs Double

A double mattress is approximately 138 × 188 cm, while a king single is approximately 107 × 203 cm.

The double is therefore:

• Wider by approximately 31 cm
• Shorter by approximately 15 cm

This creates an important distinction.

A king single is better for one person who values length, while a double provides substantially more width.

For most couples, a double or larger bed is more practical. For one teenager or adult, a king single can provide an excellent balance.

How Much Room Do You Need for a King Single?

There is no single mandatory bedroom size because the ideal layout depends on the furniture and circulation required.

As a practical planning guide, a room around 3 × 3 metres can provide a comfortable starting point for a king single arrangement, although the exact layout determines whether that space works well.

Allow enough room to:

• Walk around the bed
• Open wardrobes
• Open drawers
• Access doors
• Position bedside furniture
• Move comfortably around the room

The bed itself may fit into a much smaller room, but comfortable circulation is what makes the difference between a functional bedroom and a cramped one.

Common Questions

What are the king single bed dimensions in Australia?

The standard Australian king single mattress is approximately 107 cm wide × 203 cm long.

Is a king single bigger than a single?

Yes. A king single is approximately 15 cm wider and 15 cm longer than a standard single mattress.

Is a king single bigger than a double?

A double is wider, but a king single is longer. A double is approximately 138 × 188 cm, while a king single is approximately 107 × 203 cm.

Is a king single suitable for adults?

Yes. The 203 cm length makes a king single suitable for many solo adults, particularly taller sleepers who want more legroom.

What size sheets fit a king single?

Choose bedding specifically labelled king single. Standard single sheets are not the correct size.

Does a king single bed frame measure 107 × 203 cm?

Not necessarily. Those are the approximate mattress dimensions. The complete frame can be larger depending on the design, headboard, rails and storage.

Is a king single good for teenagers?

Yes. It offers additional width and length compared with a standard single and can remain suitable as the teenager grows.

The Finishing Touch

Understanding king single bed dimensions makes bedroom planning considerably easier.

The standard Australian king single mattress is approximately 107 × 203 cm, giving solo sleepers more length and width than a standard single while taking up substantially less space than a double or queen.

Its versatility is one of its greatest strengths. It can work beautifully in a child's bedroom, teenager's room, guest bedroom, apartment or compact adult bedroom.

Before buying, remember to measure the complete bed frame, not just the mattress. Consider headboards, storage, side rails, bedside furniture and walking space to make sure the finished room remains comfortable.

With the right proportions, bedding and surrounding furniture, a king single can provide a stylish, practical and long-lasting foundation for an Australian bedroom.

Related Glossary Terms

• King Single Bed
• King Single Mattress Dimensions
• Double Bed Dimensions Australia
• Queen Bed Width
• Dimensions of King Size Mattress
• Bed Frame

Disclaimer

Brand and collection names mentioned in this glossary are included purely for descriptive and contextual purposes. House of Isabella Australia is not affiliated with, endorsed by, or associated with the brands mentioned, and all trademarks remain the property of their respective owners.