double bed mattress dimensions cm

What Are Double Bed Mattress Dimensions cm?

The standard double bed mattress dimensions cm in Australia are approximately 138 cm wide × 188 cm long. This is the measurement of the mattress itself, not the complete bed frame. Some manufacturers may have slightly different dimensions, so checking the individual product specifications is always recommended.

In simple terms, an Australian Double mattress gives you substantially more width than a Single or King Single while taking up less space than a Queen. It is particularly popular for solo adults, teenagers, guest bedrooms and compact bedrooms.

Quick Facts

• Standard Australian Double mattress: approximately 138 × 188 cm
• Width: approximately 138 cm
• Length: approximately 188 cm
• Millimetres: approximately 1,380 × 1,880 mm
• Imperial: approximately 54 × 74 inches
• Larger than: Single and King Single
• Smaller than: Queen and King
• Best for: Solo sleepers, teenagers, guest rooms and compact spaces
• Important: Mattress dimensions are different from the overall dimensions of the bed frame

Why Are Double Mattresses So Popular?

The main reason Australians choose a Double mattress is its balance between sleeping space and room efficiency.

At approximately 138 × 188 cm, a Double provides considerably more width than a Single without requiring the larger footprint of a Queen.

For one adult, this can feel comfortably spacious. It can also be used by two people, although many couples find a Queen more comfortable for everyday sleeping because it provides additional width and length.

A Double can therefore be a practical choice when bedroom space is limited but a Single feels too restrictive.

Standard Double Bed Mattress Dimensions cm

Width

The standard Australian Double mattress is approximately 138 cm wide.

That gives a solo sleeper plenty of room to change position, stretch out and sleep comfortably.

Length

A Double mattress is approximately 188 cm long.

This is the same general length as a standard Australian Single mattress but shorter than a King Single or Queen.

For taller adults, length should therefore be considered carefully before choosing a Double.

Mattress Thickness

Thickness is separate from the standard Double footprint.

Different mattresses can have different heights depending on their construction. Foam, pocket spring, hybrid, latex and pillow-top mattresses may all have different profiles.

This is particularly important when purchasing fitted sheets or mattress protectors.

Double Mattress Dimensions Compared With Other Australian Sizes

These are useful Australian sizing guidelines. Minor differences can occur between manufacturers, so always check the exact dimensions of the mattress you are considering.

Double vs Single Mattress

A Single mattress is approximately 92 × 188 cm, while a Double is approximately 138 × 188 cm.

The main difference is width.

A Double gives you approximately 46 cm more width while maintaining the same approximate 188 cm length.

For a growing teenager or solo adult, that extra space can make a noticeable difference in comfort.

Double vs King Single Mattress

An Australian King Single is approximately 107 × 203 cm.

Compared with a King Single, a Double is:

• Approximately 31 cm wider
• Approximately 15 cm shorter

This creates an interesting choice.

If you are taller, the extra 15 cm of length offered by a King Single may be more valuable. If you prefer additional room from side to side, the Double provides considerably more width.

Double vs Queen Mattress

A Queen mattress is approximately 153 × 203 cm.

Compared with a Double, a Queen provides:

• Approximately 15 cm more width
• Approximately 15 cm more length

For a solo sleeper, the Double can offer an excellent balance of space and floor area.

For two adults sharing the mattress every night, the additional dimensions of a Queen can provide noticeably more personal sleeping space.

Who Is a Double Mattress Best For?

Solo Adults

A Double can provide generous sleeping space for one adult without taking up as much room as a Queen.

Teenagers

It can be a practical long-term bedroom choice as a teenager grows.

Guest Rooms

A Double can provide comfortable accommodation without requiring the largest available bedroom.

Compact Bedrooms

If a Queen would make the room feel crowded, a Double can preserve valuable floor space.

Apartments

The smaller footprint can work well in apartment bedrooms and other space-conscious homes.

Couples With Limited Space

Two adults can share a Double, although it may feel relatively cosy compared with a Queen.

How to Choose a Double Mattress

1. Measure Your Bedroom

Before purchasing, measure the available space for the mattress and bed frame.

Remember that the mattress is only part of the total footprint.

2. Consider Your Height

At approximately 188 cm long, a Double may not provide enough length for every taller sleeper.

If you are tall, compare it with a King Single or Queen before making your decision.

3. Consider Sleeping Habits

If you sleep alone and like extra room, a Double can be an excellent choice.

If two people will share the mattress regularly, think carefully about whether 138 cm of width will feel comfortable.

4. Check Mattress Thickness

A deeper mattress may require deeper fitted sheets and can change the overall height of the bed.

5. Match the Bed Frame

Make sure the frame is designed for the relevant Australian Double mattress dimensions.

Never rely on the word "Double" alone when purchasing furniture for a tightly fitted space.

Mattress Dimensions vs Bed Frame Dimensions

This distinction is essential.

Double bed mattress dimensions cm refer to the mattress itself, approximately 138 × 188 cm.

The overall bed frame can be larger because it may include:

• Headboards
• Side rails
• Footboards
• Upholstered surrounds
• Storage drawers
• External supports
• Decorative details

If you have limited bedroom space, check the assembled external dimensions of the bed frame rather than simply using the mattress dimensions.

A frame can add several centimetres to the width or length, and some designs can add considerably more.

Benefits & Use Cases

Space Efficient

A Double provides more sleeping room without taking up the floor area of a Queen.

Comfortable for Solo Sleepers

It offers significantly more width than a Single or King Single.

Useful in Guest Bedrooms

It provides a flexible sleeping option without dominating a smaller room.

Great for Teenagers

The additional width makes it a comfortable upgrade from a smaller bed.

Flexible Styling

Double beds can be styled with layered bedding, cushions, throws and decorative bedheads.

Storage-Friendly

A Double storage bed can create valuable additional space underneath the mattress.

Practical for Smaller Homes

The footprint can make it easier to accommodate other furniture such as wardrobes, desks and bedside tables.

House of Isabella Recommendations

When considering double bed mattress dimensions cm, look at the whole bedroom rather than the mattress in isolation.

A Double bed can work beautifully in a guest room or teenager's bedroom when paired with compact bedside furniture, layered bedding and carefully chosen lighting.

For a warm Australian interior, natural timber, soft neutral fabrics and tactile throws can create a relaxed atmosphere. An upholstered bedhead can make the Double feel more substantial without requiring a much larger frame.

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

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 updating a bedroom.

Trends for 2025 (Australia)

Multifunctional Storage Beds

Double beds with drawers or lift-up storage can make smaller bedrooms more efficient.

Warm Timber Finishes

Natural and warm timber tones create a relaxed foundation for Australian bedroom styling.

Upholstered Bedheads

Soft upholstered bedheads add comfort and visual depth without requiring a larger mattress.

Soft Curves

Rounded bedheads and curved bedside furniture can make compact rooms feel softer and more welcoming.

Layered Neutral Bedding

Cream, beige, oatmeal, taupe and earthy tones create a calm and versatile bedroom palette.

Natural Textures

Linen-look fabrics, woven details and timber bring warmth without overwhelming a smaller room.

Boutique-Hotel Influence

Layered bedding, balanced bedside lighting and restrained accessories can create a sophisticated hotel-inspired look.

Styling Advice

Make the Bed the Focal Point

Even a Double mattress can anchor the bedroom beautifully.

A statement bedhead or carefully positioned artwork can give the bed greater visual presence.

Layer Textures

Combine smooth bedding with textured cushions, a knitted or woven throw and natural materials.

Keep Accessories Proportionate

Avoid filling the bed with too many cushions or using bedside furniture that overwhelms the available floor space.

Use Wall-Mounted Lighting

Wall lights or pendants can free up bedside surfaces and are particularly useful in compact rooms.

Add a Mirror

A well-positioned mirror can reflect light and contribute to a greater sense of openness.

Use a Restrained Colour Palette

A cohesive palette of warm neutrals can make the room feel calm and spacious.

Double Mattress Bedding Guide

Remember that mattress dimensions and bedding dimensions are not the same.

A fitted sheet should be designed for an Australian Double mattress and should accommodate its depth.

A Double quilt or doona is larger than the mattress because it needs to cover the sleeping surface and provide an appropriate drop over the sides.

Always check the manufacturer's exact measurements, especially when purchasing bedding from international brands.

Common Questions

What are the double bed mattress dimensions cm?

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

What are Double mattress dimensions in millimetres?

Approximately 1,380 × 1,880 mm.

Is a Double mattress bigger than a King Single?

A Double is wider, at approximately 138 cm compared with 107 cm for a King Single, but it is shorter.

Is a Double mattress smaller than a Queen?

Yes. A Queen is approximately 153 × 203 cm, compared with approximately 138 × 188 cm for a Double.

Can two adults sleep on a Double mattress?

Yes, but it can feel relatively snug for everyday use. A Queen generally provides more personal space for couples.

Is 188 cm long enough for an adult?

It depends on the sleeper's height and preferred sleeping position. Taller adults may find a 203 cm-long King Single or Queen more comfortable.

Will a Double mattress fit every Double bed frame?

Not necessarily. Check the internal mattress dimensions of the frame and the manufacturer's specifications before purchasing.

The Finishing Touch

Understanding double bed mattress dimensions cm is an important first step when planning a comfortable bedroom.

For Australian homes, the standard measurement to remember is approximately 138 × 188 cm. This gives a solo sleeper generous space while remaining more compact than a Queen.

Before purchasing, consider your height, sleeping habits, room dimensions, bed-frame footprint and bedding requirements. A Double can be an especially practical choice for teenagers, solo adults, guest bedrooms and smaller homes.

With the right proportions and thoughtful styling, a Double bedroom can feel comfortable, spacious and beautifully considered.

Related Glossary Terms

• Double Bed Dimensions Australia
• Double Bed Dimensions
• Dimensions of Beds
• Dimensions of Queen Size Mattress
• Queen Size Mattress Measurement CM
• Mattress Firm

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.