Purchasing the right size bed sheets is essential for a comfortable and well-made bed. When it comes to king size sheets, knowing the exact dimensions can save you from the frustration of ill-fitting bedding that constantly slips off or bunches up. Whether you’re outfitting a master bedroom, upgrading your bedding for better comfort, or simply curious about standard measurements, understanding king size bed sheet dimensions is crucial for making informed decisions. This comprehensive guide breaks down everything you need to know about king size bed sheet dimensions across different measurement systems and regions.
Standard King Size Bed Sheet Dimensions
In the United States, standard king size bed sheets (also called Eastern King) are designed to fit mattresses measuring 76 inches wide by 80 inches long (193 cm × 203 cm). Here’s a breakdown of typical king size bedding dimensions:
| Sheet Type | Dimensions (inches) | Dimensions (cm) | Dimensions (meters) |
|---|---|---|---|
| Fitted Sheet | 76 × 80 × 12 | 193 × 203 × 30 | 1.93 × 2.03 × 0.30 |
| Flat Sheet | 108 × 102 | 274 × 259 | 2.74 × 2.59 |
| Duvet Cover | 104 × 90 | 264 × 229 | 2.64 × 2.29 |
It’s worth noting that these dimensions can vary slightly between manufacturers, but they generally follow these standard measurements to ensure a proper fit for king size mattresses.
King Size Bed Sheet Dimensions in Different Measurement Units
How Big is a King Size Bed Sheet in Inches
As mentioned above, the standard dimensions are:
- Fitted sheet: 76″ × 80″ × 12″ (with elastic and corner pockets)
- Flat sheet: 108″ × 102″
- Duvet cover: 104″ × 90″
- Mattress size (for reference): 76″ × 80″
How Big is a King Size Bed Sheet in Centimeters
Converting the standard king size bed sheet dimensions to centimeters:
- Fitted sheet: 193 cm × 203 cm × 30 cm
- Flat sheet: 274 cm × 259 cm
- Duvet cover: 264 cm × 229 cm
- Mattress size (for reference): 193 cm × 203 cm
How Big is a King Size Bed Sheet in Meters
For those working with metric measurements in meters:
- Fitted sheet: 1.93 m × 2.03 m × 0.30 m
- Flat sheet: 2.74 m × 2.59 m
- Duvet cover: 2.64 m × 2.29 m
- Mattress size (for reference): 1.93 m × 2.03 m
How Big is a King Size Bed Sheet in Feet
For a quick reference in feet:
- Fitted sheet: 6.3 ft × 6.7 ft × 1 ft
- Flat sheet: 9 ft × 8.5 ft
- Duvet cover: 8.7 ft × 7.5 ft
- Mattress size (for reference): 6.3 ft × 6.7 ft
International King Size Bed Sheet Dimensions
UK and European King Size Bed Sheet Dimensions
The definition of “king size” varies around the world. In the United Kingdom and parts of Europe, king size beds are smaller than their American counterparts:
- UK King Size Mattress: 60 inches × 78 inches (152 cm × 198 cm)
- UK King Size Fitted Sheet: Approximately 62 inches × 78 inches (157 cm × 198 cm)
- UK King Size Flat Sheet: Approximately 90 inches × 100 inches (230 cm × 254 cm)
Australian King Size Bed Sheet Dimensions
Australia follows yet another standard for king size bedding:
- Australian King Size Mattress: 72 inches × 80 inches (183 cm × 203 cm)
- Australian King Size Fitted Sheet: Approximately 74 inches × 80 inches (188 cm × 203 cm)
- Australian King Size Flat Sheet: Approximately 102 inches × 95 inches (259 cm × 241 cm)
California King vs. Standard King Size Bed Sheets
California King (also called Western King) is another popular size that’s often confused with the standard king. California King mattresses are narrower but longer than standard king mattresses:
- California King Mattress: 72 inches × 84 inches (183 cm × 213 cm)
- California King Fitted Sheet: Approximately 74 inches × 84 inches (188 cm × 213 cm)
- California King Flat Sheet: Approximately 102 inches × 110 inches (259 cm × 279 cm)
It’s crucial to know which king size bed you have before purchasing sheets. California King sheets will not properly fit a standard king mattress, and vice versa.
Comparing King Size Sheets to Other Sizes
Understanding how king size sheets compare to other standard sizes helps when switching mattress sizes or buying gifts.
Queen Size vs King Size Sheet Dimensions
| Sheet Type | Queen Size (cm) | King Size (cm) |
|---|---|---|
| Fitted Sheet | 152 × 203 × 30 | 193 × 203 × 30 |
| Flat Sheet | 245 × 254 | 274 × 259 |
Quick Tip: King sheets are wider, not longer, than queen sheets—ideal for larger mattresses or couples who want more personal space.
Super King Size Bedsheet Dimensions
Super King is a term used in different regions to describe beds larger than the standard king:
- UK Super King Mattress: 72 inches × 78 inches (183 cm × 198 cm)
- UK Super King Fitted Sheet: Approximately 74 inches × 78 inches (188 cm × 198 cm)
- UK Super King Flat Sheet: Approximately 102 inches × 100 inches (259 cm × 254 cm)
In other regions, Super King might refer to even larger sizes:
- Fitted Sheet: 200 cm × 200 cm × 30-40 cm
- Flat Sheet: Up to 305 cm × 274 cm
Comprehensive Bed Sheet Sizes Chart
Here’s a comprehensive comparison of different bed sheet sizes:
| Bed Size | Mattress Dimensions (in) | Fitted Sheet (in) | Flat Sheet (in) | Mattress Dimensions (cm) | Fitted Sheet (cm) | Flat Sheet (cm) |
|---|---|---|---|---|---|---|
| Twin | 38 × 75 | 39 × 75 × 12 | 66 × 96 | 97 × 191 | 99 × 190 × 30 | 168 × 244 |
| Twin XL | 38 × 80 | 39 × 80 × 12 | 66 × 102 | 97 × 203 | 99 × 203 × 30 | 168 × 259 |
| Full/Double | 54 × 75 | 54 × 75 × 12 | 81 × 96 | 137 × 191 | 137 × 190 × 30 | 208 × 244 |
| Queen | 60 × 80 | 60 × 80 × 12 | 90 × 102 | 152 × 203 | 152 × 203 × 30 | 245 × 254 |
| King | 76 × 80 | 76 × 80 × 12 | 108 × 102 | 193 × 203 | 193 × 203 × 30 | 274 × 259 |
| Cal King | 72 × 84 | 74 × 84 × 12 | 102 × 110 | 183 × 213 | 188 × 213 × 30 | 259 × 279 |
| Super King | Varies by region | Up to 78 × 80 × 15 | Up to 120 × 110 | Varies by region | Up to 200 × 200 × 40 | Up to 305 × 274 |
Frequently Asked Questions about King Size Bed Sheets
What is the standard size of a king size bed sheet?
The standard king fitted sheet measures 76 × 80 inches (193 × 203 cm) with a depth of 12–16 inches (30–40 cm). Flat sheets are typically 108 × 102 inches (274 × 259 cm).
What size sheet is 78×80×12?
A sheet measuring 78 × 80 × 12 inches is designed to fit a standard king mattress. The slight increase from the standard 76-inch width (to 78 inches) allows for easier fitting and accounts for the elastic corners. This is a common size for king fitted sheets in the US market.
What size is a 90×100 bed?
A mattress that measures 90 × 100 inches (or 229 × 254 cm) is significantly larger than a standard king size bed. This would be considered an oversized or custom bed, similar to what’s sometimes called an “Alaskan King” in some markets. For a bed of these dimensions, you would likely need custom-sized sheets as standard king sheets would be too small.
Will King Sheets Fit a California King Bed?
No, standard king sheets will not properly fit a California king bed. California king mattresses are 4 inches narrower but 4 inches longer than standard king mattresses. Using standard king sheets on a California king bed will result in sheets that are too wide and too short.
How Can I Tell if I Have a King or California King Bed?
The simplest way to tell is by measuring your mattress:
- Standard King: 76 inches wide × 80 inches long
- California King: 72 inches wide × 84 inches long
If your mattress is wider than it is long, you have a standard king. If it’s longer than it is wide, you have a California king.
What Size Sheets Fit Split King Beds?
A split king bed consists of two twin XL mattresses placed side by side, creating a surface equal to a king size bed. For split king beds, you’ll need:
- Two Twin XL fitted sheets (38″ × 80″ each)
- One king size flat sheet (108″ × 102″)
- King size pillowcases
This arrangement allows each sleeper to have their preferred mattress firmness while maintaining the appearance of a single king bed.
Factors That Affect King Size Bed Sheet Fit
Mattress Thickness
Modern mattresses vary significantly in thickness, affecting which fitted sheets will work best:
- Standard pocket depth: Typically 10-12 inches
- Deep pocket: Usually 13-17 inches
- Extra deep pocket: 18-22 inches
Always check your mattress thickness before purchasing fitted sheets to ensure they’ll stay securely in place.
Elastic Corners and Edges
For the best fit, look for:
- Fully elasticized fitted sheets (elastic around the entire perimeter, not just corners)
- Strong, durable elastic that retains its stretch
- Corner straps or bands for additional security
Material Shrinkage
Different sheet materials can shrink at different rates after washing:
- Cotton sheets may shrink 3-5%
- Linen can shrink up to 4%
- Synthetic materials like polyester typically shrink less than 1%
Manufacturers often account for potential shrinkage by making sheets slightly larger, but it’s something to consider when choosing between sizes or materials.
Pillow-Top Mattresses and Toppers
If you use a pillow-top mattress or add a mattress topper, add 1-2 inches to your depth measurements when selecting fitted sheets.
Material Options and Their Impact on Size
Some sheet materials behave differently post-wash or even feel tighter/looser based on stretch:
- Cotton: Breathable, soft, may shrink slightly
- Microfiber: Durable and stretch-resistant, often more wrinkle-free
- Linen: Luxury feel, but less stretch—measure carefully
- Bamboo or Tencel: Eco-friendly, often softer and moisture-wicking
How to Measure Your Bed for King Size Sheets
To ensure you get the perfect fit:
- Measure the mattress width from side to side at its widest point
- Measure the mattress length from head to foot
- Measure the mattress depth from the base to the top of the mattress
- Add 1-2 inches to the depth measurement if you use a mattress topper
For king size beds, confirm whether you have a standard king or California king before purchasing sheets. The difference in dimensions can make a significant impact on fit.
Where to Buy King Size Sheets
Online Retailers
Amazon, Wayfair, and Overstock offer a wide selection of king size sheets in various materials, depths, and price points.
Specialty Bedding Stores
Brooklinen, Parachute, and Boll & Branch provide premium, organic options with detailed size specifications.
Department Stores
Macy’s, Target, and Walmart often carry standard king sizes in multiple materials at different price points.
Tip: Always read reviews to ensure sheets don’t run small or shrink excessively after washing.
Final Thoughts
Choosing the right king size bed sheets involves understanding the exact dimensions needed for your specific mattress. Whether you’re measuring in inches, centimeters, meters, or feet, knowing your mattress size and thickness is crucial for a comfortable fit.
Remember that regional variations exist, so always confirm whether you’re dealing with US/Eastern King, California/Western King, UK King, or another standard. Pay attention to pocket depth for fitted sheets, especially if you have a thicker luxury mattress or use a mattress topper.
So, how big is a king size bed sheet? The answer depends on whether you’re measuring in inches, cm, meters, or feet—but generally, a standard king fitted sheet is 76 × 80 inches (193 × 203 cm) with a depth of 12 inches (30 cm), while flat sheets are typically 108 × 102 inches (274 × 259 cm). Always account for mattress depth, material stretch, and your own preferences when choosing the right size.
By taking accurate measurements and understanding the dimensions outlined in this guide, you’ll be able to select king size sheets that fit perfectly, stay in place, and provide the comfort you deserve for a good night’s sleep.
