California King Mattress Size Guide
The California King is 4 inches longer and 4 inches narrower than a standard King — the best choice for tall adults over 6'2" who prioritize length over width.
About the California King Size
The California King (72×84 inches) is often mistakenly assumed to be the largest mattress size, but it's actually slightly smaller in total area than a standard King (72 sq ft vs. 73.7 sq ft). The distinctive shape — narrower and longer — makes it the best choice for adults over 6'2" who prioritize length clearance over width, and for rooms that are longer than they are wide. The Cal King's 84-inch length gives even very tall adults (up to 6'10") comfortable clearance. The 4-inch width reduction from King (76 to 72 inches) is meaningful — each partner gets 36 inches rather than 38 inches. Cal King bedding, bed frames, and accessories are noticeably harder to find and more expensive than King equivalents. For most buyers, a standard King is the better choice unless height is a specific concern or the room's dimensions favor the narrower footprint.
Best For
- ✓Adults over 6'2" (up to 6'10")
- ✓Rooms that are narrow and long
- ✓Couples where one partner is very tall
- ✓California residents (regional preference)
- ✓Pets at the foot of the bed (extra length)
Not Ideal For
- ✗Rooms under 12 feet wide (already narrower than King)
- ✗Couples prioritizing width over length
- ✗Those who want maximum bedding selection (King is more available)
Top Mattresses Available in California King
Best for: Budget shoppers · Back sleepers
Why it stands out: Cooling gel Memory Foam and a cool-to-touch top fabric
Keep in mind: Firm feel provides less cushioning than the taller Relax and Supreme
Best for: Budget shoppers · Back sleepers
Why it stands out: Low current pricing for a foam-and-coil hybrid
Keep in mind: This legacy route represents the same current Walmart item as the 10-inch Hybrid catalog row
Best for: Budget shoppers · Side sleepers
Why it stands out: Three-inch memory-foam comfort layer gives the Medium more contouring than a thin budget foam bed
Keep in mind: Deep memory-foam contouring can feel slower to move on than a hybrid
Buy with confidence
Try Lucid's current 10-inch Medium at home for 100 nights at Lucid
Best for: Side sleepers · Back sleepers
Why it stands out: Cool-to-touch top panel and three-zone foam
Keep in mind: Exact foam densities and cover fiber content are not published
Best for: Value focused shoppers who want a conventional medium firm memory foam feel · Back and stomach sleepers who do not need an extra firm surface
Why it stands out: Certification scope is specific: CertiPUR-US covers the foam layers and OEKO-TEX STANDARD 100 covers only the knit cover; Bare Home separately states that the mattress is fiberglass-free
Keep in mind: Only one feel is offered, and Bare Home itself says lighter side sleepers may prefer something softer
Buy with confidence
100-night Good Dreams comfort trial at Bare Home
Best for: Budget shoppers · Side sleepers
Why it stands out: Washable Cool Silk zipper cover
Keep in mind: Queen and most standard sizes were sold out at verification
California King Size — Frequently Asked Questions
Is California King bigger than King?
In total area, no — a standard King (76×80) is slightly larger (6,080 in²) than a California King (72×84 = 6,048 in²). The Cal King is longer (84 vs. 80 inches) but narrower (72 vs. 76 inches). It's not the 'biggest' — it's the 'longest.'
Who should choose a California King over a regular King?
Adults over 6'2" who need the extra 4 inches of length, and those whose bedroom is longer than it is wide. If you're under 6'2", the standard King is almost always the better choice for its extra width and more available bedding.
Is California King bedding hard to find?
More so than King. Major retailers carry Cal King, but the selection is notably smaller. Specialty sizes and thread counts in Cal King have fewer options. Budget 10–20% more for the same bedding quality vs. King.
Can I put King sheets on a California King?
No — King sheets are too wide (90 inches) and too short (108 inches length of fabric) for a California King. California King sheets run differently proportioned. Never assume King and Cal King are interchangeable.
What's the difference in price between King and California King?
Mattress pricing is often similar between the two sizes — within 5%. The ongoing cost difference in bedding and accessories is where Cal King becomes noticeably more expensive over time.