What Is Size Of King Size Mattress? Dimensions, Variations, and Room Fit
If you’re asking “What Is Size Of King Size Mattress”, you’re probably comparing bed sizes or checking if a king will fit in your room. This guide breaks down the standard king mattress dimensions, how they differ by region, and what else to keep in mind before choosing this larger size.
What is the standard size of a king size mattress?
In many regions, when people say king size mattress, they mean a Standard King (often called an “Eastern King”).
Typical king size mattress dimensions:
| Mattress Type | Dimensions (Inches) | Dimensions (Centimeters) |
|---|---|---|
| Standard King | 76" x 80" | 193 cm x 203 cm |
So, when you search “What Is Size Of King Size Mattress”, the most common answer is:
A king size mattress is approximately 76 inches wide and 80 inches long.
However, exact dimensions can vary slightly by manufacturer, and king size can mean different things in different countries.
Are king mattress sizes the same in every country?
No. The answer to “What Is Size Of King Size Mattress” depends on where you are. Here are some common variations:
North America (US/Canada)
- Standard King (Eastern King): 76" x 80" (193 x 203 cm)
- California King: 72" x 84" (183 x 213 cm) – narrower and longer than a standard king
Both are called “king,” but they are not the same size. A California king is better for taller sleepers, while a standard king offers more width.
United Kingdom & Ireland
Common “king” sizes include:
- King: Typically around 60" x 78" (152 x 198 cm)
- Super King: Typically around 72" x 78" (183 x 198 cm)
In these regions, the Super King is closer in width to a North American king, though slightly shorter in length.
Europe (varies by country)
European “king” sizes are often based on metric dimensions, with common sizes around:
- 160 x 200 cm
- 180 x 200 cm
These are similar in area to other king sizes but may differ in exact width or length.
👉 Key point: Always check local standard sizes and exact measurements from the seller. The phrase “king size” alone does not guarantee one universal dimension.
Why does the size of a king mattress matter?
Understanding What Is Size Of King Size Mattress is important for several reasons:
- Room fit: A king mattress takes up a significant amount of floor space.
- Bedding and accessories: Sheets, mattress protectors, and bed frames are all size-specific.
- Comfort for co-sleepers: A king can offer more individual space for couples or those sharing with children or pets.
Knowing the exact dimensions helps avoid issues like a frame that doesn’t fit, bedding that’s too small, or a bed that overwhelms the room.
How much space do you need for a king size mattress?
Besides knowing What Is Size Of King Size Mattress, it helps to think about room layout.
A common guideline is:
- Leave at least 24–30 inches (about 60–75 cm) of walking space around the sides and foot of the bed when possible.
For a standard king (76" x 80"):
- Many people find it most comfortable in bedrooms around 12' x 12' (3.7 m x 3.7 m) or larger.
- Smaller rooms can sometimes fit a king, but it may limit space for dressers, nightstands, or seating.
What are the different types of king size mattresses?
When people ask “What Is Size Of King Size Mattress”, they sometimes discover there’s more than one version of “king.” Common examples include:
Standard King (Eastern King)
- Approx. 76" x 80" (193 x 203 cm)
- Wide sleeping space, often preferred by couples who want extra room side-to-side.
California King
- Approx. 72" x 84" (183 x 213 cm)
- Slightly narrower but longer, often chosen by taller individuals.
Split King
- Usually two twin XL mattresses, each about 38" x 80", placed side-by-side.
- Combined size is close to a standard king (76" x 80"), with the flexibility of separate sides.
How do I know which king size is right for me?
Once you understand What Is Size Of King Size Mattress, the next step is matching the size to your needs:
- Body height: Taller sleepers may appreciate the extra length of a California king or similar long format.
- Room shape: A wider room often suits a standard king; a narrower, longer room may suit a narrower, longer king size.
- Sleeping partners: Co-sleepers who value personal space may prefer the extra width of a standard king or wider regional equivalent.
- Existing furniture: Consider nightstands, dressers, and doors when planning the bed position.
✔️ Quick Mattress Takeaways
Key points about “What Is Size Of King Size Mattress”
- A common answer to “What Is Size Of King Size Mattress” is 76" x 80" (193 x 203 cm) for a standard king in North America.
- King sizes vary by region: “king,” “super king,” and metric king options are not identical worldwide.
- California king is usually narrower and longer than a standard king.
- Always check exact measurements from the manufacturer, not just the name “king.”
- Make sure your bedroom has enough clearance for comfortable movement around a king bed.
- Choose a king size by considering room size, sleeper height, and how many people share the bed.
Understanding these basics will help you interpret what “king size” really means in your area and choose a mattress dimension that fits both your body and your bedroom.
