double bed size in centimetres

What Is the Double Bed Size in Centimetres?

The standard double bed size in centimetres in Australia is approximately 138 cm wide × 188 cm long. These measurements refer to the mattress itself rather than the complete bed frame.

In simple terms, an Australian Double sits between a King Single and a Queen. It offers substantially more width than a Single while taking up less floor space than a Queen, making it a practical choice for solo adults, teenagers, guest bedrooms and compact homes.

Small variations can occur between manufacturers, so it is always sensible to check the exact mattress specifications before purchasing a frame or bedding.

Quick Facts

• Standard Double mattress: approximately 138 × 188 cm
• Width: approximately 138 cm
• Length: approximately 188 cm
• Millimetres: approximately 1,380 × 1,880 mm
• Approximate inches: 54 × 74 inches
• Wider than: Single and King Single
• Narrower than: Queen and King
• Best suited to: Solo sleepers, teenagers and guest rooms
• Important: The complete bed frame will usually be larger than the mattress

Why Is the Double Bed Size So Popular?

The main reason Australians choose a Double is its balance of sleeping space and practicality.

At approximately 138 × 188 cm, a Double gives one person plenty of room to stretch out without requiring the larger footprint of a Queen. It can also work for two people where bedroom space is limited, although most couples will find a Queen more comfortable for everyday sleeping.

The relatively compact dimensions make a Double particularly useful in:

• Teenagers' bedrooms
• Guest rooms
• Apartments
• Smaller master bedrooms
• Rental properties
• University accommodation
• Multifunctional rooms

Standard Double Bed Size in Centimetres

Width

The standard Australian Double mattress is approximately 138 cm wide.

This is around 46 cm wider than a standard Single mattress, which is approximately 92 cm wide.

Length

The standard Double mattress is approximately 188 cm long.

This is the same approximate length as a Single, but 15 cm shorter than a King Single or Queen.

For taller sleepers, this difference is important when deciding between a Double and a longer mattress size.

Thickness

The height of a Double mattress is not fixed.

Mattress thickness varies according to construction, materials and design. A basic foam mattress may be considerably thinner than a premium hybrid or pillow-top mattress.

Thickness is particularly important when buying fitted sheets and mattress protectors.

Double Bed Size Compared With Other Australian Sizes

These are standard Australian mattress measurements and should be used as a starting point. Exact dimensions can vary slightly between brands.

Double vs King Single

A King Single is approximately 107 × 203 cm, while a Double is approximately 138 × 188 cm.

The Double is therefore:

• About 31 cm wider
• About 15 cm shorter

If you are a taller solo sleeper, the additional length of a King Single may be more valuable. If you prefer additional width, the Double offers considerably more room from side to side.

Double vs Queen

A Queen mattress is approximately 153 × 203 cm.

Compared with a Double, a Queen provides around:

• 15 cm more width
• 15 cm more length

That difference can be significant for couples.

A Double can be a smart space-saving option, while a Queen generally provides greater everyday comfort for two adults.

Is a Double Bed Suitable for Two Adults?

Yes, two adults can sleep on a Double, but it can feel relatively snug.

At approximately 138 cm wide, two people would have around 69 cm of width each if the space were divided equally.

For occasional guest use, this may be perfectly practical. For couples sleeping together every night, a Queen may provide a more comfortable amount of personal space.

How Much Bedroom Space Does a Double Need?

Understanding the double bed size in centimetres is only part of planning the room.

The mattress itself measures approximately 138 × 188 cm, but you also need room for the bed frame and comfortable movement.

Consider space for:

• Walking beside the bed
• Bedside tables
• Wardrobes
• Drawers
• Bedroom doors
• Cleaning
• Making the bed
• Other furniture

A Double can be a particularly useful choice when a Queen would leave the room feeling crowded.

Mattress Size vs Bed Frame Size

This distinction is essential.

The mattress may measure approximately 138 × 188 cm, while the complete bed frame can be considerably larger.

A frame may add space for:

• Headboards
• Side rails
• Footboards
• Upholstered surrounds
• Storage drawers
• Decorative details
• Structural components

If you're working with limited floor space, always check the assembled external dimensions of the bed frame rather than relying solely on the mattress size.

How to Choose a Double Bed

1. Measure the Room

Mark out an area of approximately 138 × 188 cm to understand how the mattress will fit.

Then add the expected dimensions of the bed frame.

2. Consider Your Height

At 188 cm long, a Double is shorter than a King Single and Queen.

Taller sleepers may prefer a longer mattress.

3. Think About Who Will Use It

A Double is particularly well suited to one adult or teenager.

For two adults, consider whether the additional width of a Queen would be worthwhile.

4. Consider Storage

A Double storage bed can be useful in compact bedrooms, providing additional space for bedding, clothing and seasonal items.

5. Check Bedding Compatibility

Make sure fitted sheets, mattress protectors and other bedding are designed for the Australian Double dimensions.

Benefits & Use Cases

Comfortable for Solo Sleepers

A Double provides significantly more room than a Single.

Great for Teenagers

It offers additional space as teenagers grow and can remain useful into adulthood.

Practical for Guest Rooms

A Double can accommodate guests without requiring the largest bedroom.

Space Efficient

Its smaller footprint can leave more room for wardrobes, desks and other furniture.

Useful for Apartments

The compact dimensions work well in many smaller Australian homes.

Flexible Styling

Double beds can be dressed with layered bedding, throws, cushions and statement bedheads.

Storage Potential

Storage bases can turn unused space beneath the mattress into practical organisation.

House of Isabella Recommendations

When considering the double bed size in centimetres, think about how the complete room will function rather than focusing only on the mattress.

For a guest room, a Double can provide an excellent combination of comfort and practicality. Pair it with a compact bedside table, soft lighting and layered bedding for a welcoming atmosphere.

For a teenager's bedroom, consider a Double bed with integrated storage to maximise usable space.

Warm timber, textured upholstery and neutral bedding can give a Double bed a sophisticated Australian aesthetic without making a smaller room feel crowded.

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

Buy Now, Pay Later options including Afterpay and Zip can also provide flexibility when planning a bedroom update.

Trends for 2025 (Australia)

Multifunctional Beds

Storage beds continue to be useful where bedrooms need to perform several functions.

Warm Timber

Natural timber finishes create a relaxed, welcoming foundation.

Upholstered Bedheads

Soft bedheads add comfort and visual impact while helping the bed become a focal point.

Rounded Details

Curved bedheads and rounded bedside furniture can soften the strong rectangular proportions of the mattress.

Warm Neutral Bedding

Cream, beige, oatmeal and earthy shades create a calm bedroom environment.

Natural Textures

Linen-look fabrics, woven accessories and timber add tactile depth.

Boutique-Hotel Styling

Layered bedding, symmetrical lighting and carefully selected accessories can give a Double bedroom a polished, luxurious feel.

Styling Advice

Make the Bed the Focal Point

Use a statement bedhead, artwork or carefully styled bedding to give the Double visual importance.

Keep the Bedding Proportionate

A few well-selected cushions and a folded throw are usually enough to create depth without overcrowding the bed.

Use Vertical Space

Wall-mounted lighting can free up bedside surfaces and help compact rooms feel more open.

Add a Mirror

A strategically positioned mirror can reflect light and contribute to a greater sense of spaciousness.

Choose Compact Furniture

Keep bedside tables and surrounding furniture appropriately scaled to the room.

Use a Cohesive Colour Palette

Warm neutrals and natural tones can make the room feel calm and connected.

Double Bed Bedding Guide

The double bed size in centimetres refers to the mattress, not the bedding.

A fitted sheet should be made for an Australian Double mattress and should also accommodate the mattress thickness.

A Double quilt or doona will be larger than the mattress because it needs to cover the sleeping surface and extend over the sides.

Always check the manufacturer's measurements, particularly when buying bedding from international brands.

Common Questions

What is the double bed size in centimetres in Australia?

A standard Australian Double mattress is approximately 138 cm wide × 188 cm long.

What is a Double bed in millimetres?

Approximately 1,380 × 1,880 mm.

Is a Double bed bigger than a King Single?

It is wider but shorter. A Double is approximately 138 × 188 cm, while a King Single is approximately 107 × 203 cm.

Is a Double bed smaller than a Queen?

Yes. A Queen is approximately 153 × 203 cm, while a Double is approximately 138 × 188 cm.

Can two adults sleep on a Double?

Yes, although it can feel relatively compact. A Queen generally provides more space for couples.

Is a Double suitable for a teenager?

Yes. Its generous width makes it a comfortable long-term option for many teenagers.

Are all Double bed frames the same size?

No. Mattress dimensions are relatively standard, but bed frames vary depending on their construction, headboard, storage and other features.

The Finishing Touch

The key measurement to remember for the double bed size in centimetres is approximately 138 × 188 cm.

This compact yet generous size makes a Double particularly useful for solo adults, teenagers, guest rooms and smaller bedrooms. It offers considerably more width than a Single while taking up less space than a Queen.

Before buying, measure both the mattress area and the complete bed-frame footprint. Consider your height, sleeping arrangements, available walking space and bedding requirements.

With thoughtful proportions and carefully chosen furniture, a Double bed can create a bedroom that feels comfortable, practical and beautifully styled.

Related Glossary Terms

• Double Bed Dimensions Australia
• Double Bed Mattress Dimensions CM
• Double Bed Dimensions
• Dimensions of Beds
• Dimensions of Queen Size Mattress
• Queen Bed Width

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.