Choosing the right mattress size isn’t as simple as fitting a bed into a bedroom. It’s about creating a comfortable, restful space that matches your lifestyle. Whether you’re a solo sleeper who loves to stretch out or a couple sharing your bed with pets or young children, the size of your mattress can make a big difference in your sleep quality.
In this comprehensive mattress size guide featuring mattress dimensions in cm, feet, and inches, you’ll find easy-to-understand charts, detailed breakdowns of standard and specialty mattress sizes, and practical tips for selecting the perfect fit. We’ll help you consider not just the measurements, but also your unique needs, room dimensions, and future plans—so you can experience better sleep for years to come.
Mattress size chart: standard bed sizes and mattress dimensions
When shopping for a new mattress, understanding the standard mattress sizes and their exact measurements is the first step to finding the perfect fit. Mattress sizes can vary slightly by manufacturer, but most follow these widely recognized dimensions. Below is a quick reference chart to help you compare the most common mattress sizes in cm, inches, and feet:
| Mattress Size | Mattress Dimensions (cm) | Mattress Dimensions (inches) | Mattress Dimensions (feet) | Best For |
|---|---|---|---|---|
| Twin (Single) | 96.5 × 190.5 | 38" × 75" | 3.16’ × 6.25’ | Children, teens, small bedrooms |
| Twin XL | 96.5 × 203 | 38" × 80" | 3.16’ × 6.66’ | Taller teens, college dorms, split king setups |
| Full (Double) | 134 × 190.5 | 53" × 75" | 4.41’ × 6.25’ | Solo adults, guest rooms |
| Queen | 152.5 × 203 | 60" × 80" | 5’ × 6.66’ | Couples, primary bedrooms, solo adults who like space |
| King | 193 × 203 | 76" × 80" | 6.3’ × 6.66’ | Couples, families, large bedrooms |
| California King | 183 × 213 | 72" × 84" | 6’ × 7’ | Tall sleepers, couples, spacious bedrooms |
| Split King | 193 × 203 | 76" × 80" | 6.3’ × 6.66’ | Couples with different sleep preferences, large bedrooms |
General tips
- Twin and Twin XL mattresses are ideal for single sleepers and smaller spaces.
- Full mattresses offer more width for solo sleepers who want the extra room.
- Queen mattresses are the most popular size, balancing comfort and space for couples or solo sleepers.
- King, California king, and split king mattresses provide extra width or length, perfect for couples who want plenty of space or for families who sleep with pets or kids.
Learn more about Casper mattress sizes and mattress dimensions in our Mattress Size Guide.
Specialty and custom mattress sizes
While standard mattress sizes work for most people, sometimes your space, needs, or preferences require something a little bit different. Specialty and custom mattress sizes, such as RV mattresses, offer unique dimensions to accommodate unusual spaces, taller sleepers, or specific lifestyle needs. Here’s a look at some of the most common specialty and custom sizes on the market:
Crib mattresses
- Mattress dimensions: 28" x 52" inches or 71 x 132 cm
- Designed for infant cribs, they are suitable for babies and toddlers and are regulated for safety and fit.
Small single mattresses
- Mattress dimensions: 30" x 75" inches or 76 x 190 cm
- Narrower than a standard twin mattress, small single beds are often used for young children, cots, or antique bed frames.
Full XL mattresses
- Mattress dimensions: 54" x 80" inches or 137 x 203 cm
- A full XL mattress offers the same width as a standard full mattress but adds five extra inches of length, making it a great option for taller solo sleepers who want more legroom.
Olympic queen mattresses
- Mattress dimensions: 66" x 80" inches or 167 x 203 cm
- Roughly six inches wider than a standard queen mattress, the Olympic queen bed is perfect for couples who want more space but don’t have room for a king.
RV mattresses
- There are several mattress sizes designed specifically for recreational vehicles (RVs) and campers, such as the RV queen (60" x 75" inches) and RV king (72" x 80" inches). These sizes maximize comfort in compact spaces, such as RVs.
Wyoming king, Texas king, and Alaskan king mattresses
- Mattress dimensions:
- Wyoming King: 84" x 84" inches or 213 x 213 cm
- Texas King: 80" x 98" inches or 203 x 249 cm
- Alaskan King: 108" x 108" inches or 274 x 274 cm
- These oversized mattresses are designed for those who want maximum space. They are perfect for large families, multiple sleepers, or anyone who loves to sprawl out. Due to their size, they typically require extra-large bedrooms.
What to consider with specialty mattresses
- Availability: Specialty sizes may not be stocked everywhere and can take longer to order. Casper Canada currently sells twin, twin XL, full, queen, king, California king, and Split king mattresses. Shop Casper’s full mattress lineup.
- Bedding & accessories: Sheets, protectors, like our Mattress Protector, and bed frames may need to be custom-made or specially sourced.
- Budget: Custom and oversized mattresses often cost more than standard mattress sizes.
How to choose the right mattress for your lifestyle
Finding a mattress that suits not only your sleep space but also your daily life, routines, and future plans is crucial. Here are the key factors to consider when deciding which mattress size is best for your lifestyle:
1. Number of sleepers
- Solo Sleepers: If you sleep alone, a twin, twin XL, or full mattress might be all you need, especially if you have a smaller bedroom or want to maximize floor space.
- Couples: Queen and king size mattresses are the most popular for two people, offering comfort and enough personal space for two.
- Families and pets: If children or pets often join you in bed, a king or even a California king mattress can provide the extra room you need.
2. Bedroom size and layout
Before choosing a mattress, make sure to measure your bedroom. You want there to be enough space to walk around the bed (ideally no less than two feet of clearance) and fit other key furniture, such as a dresser or nightstand like the Repose Wooden Nightstand.
For smaller bedrooms, a twin, twin XL, or full bed can help the space feel less crowded, while queen, king, California king, and split king sizes are better suited to larger bedrooms.
3. Your height and sleep habits
Taller sleepers may prefer the extra length that twin XL, queen, king, California king, and split king mattresses offer.
No matter your height, if you tend to move around a lot or like to sprawl out while you sleep, consider a wider mattress such as a queen or king.
4. Lifestyle factors
- Frequent moves: If you relocate regularly, smaller mattresses are easier to transport and fit into various spaces. When buying a mattress for your new home, consider a bed-in-a-box like those at Casper. Our mattresses come in a convenient box that’s easy to maneuver. We also offer In-Home Delivery and Setup.
- Future plans: When choosing a mattress size, think about long-term changes. For instance, if a partner moving in, a new child, or new pets are on the horizon, this could impact your ideal mattress size.
- Guests: If you frequently host overnight visitors, a full or queen mattress in your guest room offers flexibility for both solo guests and couples.
5. Budget
Mattress size affects price—and not just for the mattress itself, but also for bedding, bed frames, and accessories, like a Comfy Mattress Topper. Choose the size that comfortably fits your space and budget, balancing comfort with cost.
Final thoughts
Choosing the right mattress size is more than just picking a number from a chart; it’s about creating a sleep environment that truly fits your lifestyle, space, and needs. The right size can make your bedroom feel more comfortable and even help you sleep better.
Before picking a mattress size, take the time to measure your room, consider who will be sharing the mattress, and think about how your needs might change down the road. Remember, a mattress is a long-term investment in your comfort and well-being.
To learn more about Casper Canada’s mattresses, visit our Compare Mattresses page or take our Mattress Quiz.
FAQs
What is a queen size mattress?
A queen size mattress typically measures 60” x 80” or 152.5 x 203 cm. However, you should check with the manufacturer as mattress sizes can vary slightly. For more information on mattress sizes, check out our Mattress Size Guide.
What is a king size mattress?
A king size mattress typically measures 76” x 80” or 193 x 203 cm. However, you should check with the manufacturer as mattress sizes can vary slightly. For more information on mattress sizes, check out our Mattress Size Guide.
What is a twin size mattress?
A twin size mattress typically measures 38” x 75” or 96.5 x 190.5 cm. However, you should check with the manufacturer as mattress sizes can vary slightly. For more information on mattress sizes, check out our Mattress Size Guide.
What’s the difference between a twin mattress and a twin XL mattress?
Twin mattress dimensions are usually 38" x 75" inches or 96.5 x 190.5 cm, while twin XL mattress dimensions are 38" x 80" inches or 96.5 x 203 cm. Therefore, the key difference is the extra length that a Twin XL mattress offers, making it ideal for taller sleepers who need more legroom. For more information on mattress sizes, check out our Mattress Size Guide.
What’s the difference between a twin mattress and a single mattress?
A twin mattress and a single mattress are the same. They both have mattress dimensions of 38" x 75" inches or 96.5 x 190.5 cm, and are simply different names for the same standard mattress size. For more information on mattress sizes, check out our Mattress Size Guide.
Can two people sleep on a full mattress?
Yes, two people can fit on a full or double mattress, though it may feel cramped. If your bedroom is large enough, couples typically prefer queen or king mattresses for the added width and length.
What mattress size is best for couples?
Queen and king size mattresses are the most popular choice for couples. Queen beds offer a good balance of space and fit most bedrooms, while king beds provide extra room for two sleepers, along with pets or children. For more information on mattress sizes, check out our Mattress Size Guide.
Will a larger mattress last longer?
Mattress lifespan depends on a range of factors, including mattress care and the quality of the materials. Mattress size typically does not impact longevity. However, larger mattresses may experience more wear if shared by more than two people, heavier people, or pets. Learn more about how long mattresses last and when to replace your mattress.
Can I use my old bedding on a new mattress size?
Bedding, including sheets, mattress protectors, and duvets, needs to match your mattress size for a proper fit. So if you upgrade from a queen bed to a king bed, you will need to swap out your queen sheets for king size sheets.
Need new bedding? Shop Casper’s sheets & bedding collection.
How do I move a large mattress into my home?
Measure your bedroom, along with hallways and doorways, before purchasing a large mattress. That said, some mattresses, like the bed-in-a-box models at Casper, are easier to move. Casper Canada even offers In-Home Delivery & Setup. Shop mattresses-in-a-box.
