Alaskan King vs King
The Alaskan King (108" x 108") is nearly twice the size of a standard King (76" x 80"). While a King is the largest standard mattress widely available, the Alaskan King offers 81 square feet vs 42.2–a 92% increase in sleeping space.
For a full overview of Alaskan King dimensions, sellers, and room requirements, see our Alaskan King size guide.
Size Comparison
| Specification | Alaskan King | King |
|---|---|---|
| Width | 108"✓ | 76" |
| Length | 108"✓ | 80" |
| Square Feet | 81 sq ft✓ | 42.2 sq ft |
| Room Size Needed | 14' x 14' | 12' × 14' |
✓ indicates the larger size in each category
Which Size Is Right for You?
Choose Alaskan King If...
- You co-sleep with children or multiple large pets
- You have a very large bedroom (14'x14' or bigger)
- You want maximum sleeping space regardless of cost
- You don't mind specialty bedding and frames
Choose King If...
- You want a bed available at any mattress store
- You prefer standard bedding that's easy to find and affordable
- Your bedroom is average to large (12'x12')
- You're a couple without kids or pets in bed
Frequently Asked Questions
How much bigger is an Alaskan King than a King?
An Alaskan King is 92% larger–81 square feet vs 42.2 square feet. It's 32 inches wider and 28 inches longer than a standard King.
Can I use King sheets on an Alaskan King?
No. King sheets fit a 76" x 80" mattress. An Alaskan King is 108" x 108"–you'd be short by over 2.5 feet in each direction. You need specialty Alaskan King bedding.
How much more does an Alaskan King cost than a King?
A King mattress costs $500–$2,500 from mass-market brands. An Alaskan King costs $2,500–$7,000+ from specialty manufacturers. Factor in more expensive frames ($1,000–$3,000) and bedding ($150–$400) too.
Is an Alaskan King worth the upgrade from a King?
If you co-sleep with children, have large pets, or simply want maximum space and have a 14'+ bedroom, yes. For couples without kids or pets in bed, a King is usually sufficient and far more practical.