by Use the size chart first. Once you know the size, compare our top mattress picks before buying. Our top pick is Saatva Classic, with two backup options in the table below.
Best mattresses to compare
| Rank | partner option | Why it fits |
|---|---|---|
| #1 | Saatva Classic | Best overall mattress check |
| #2 | Puffy Cloud | Value comfort option |
| #3 | Amerisleep AS3 | Foam comfort option |
Editor's pick, mattress
Saatva Classic Mattress
For the full breakdown, see our hands-on Saatva review.
From $1,174 (Twin) · 3 firmness options · Euro pillow top · 365-night trial · Lifetime warranty
A California king mattress measures 72 inches wide by 84 inches long (6 feet x 7 feet) - 4 inches narrower but 4 inches longer than a standard king. It is the longest standard mattress size available in the United States. This page covers exact California king dimensions, who actually needs the extra length, minimum room size, the sheet challenge, and how it compares to a standard king. For the full comparison of these two sizes, see our dedicated California king vs. king guide.
TL;DR
Mattress sizes in the US: Twin (38x75), Twin XL (38x80), Full (54x75), Queen (60x80), King (76x80), Cal King (72x84), and specialty (Alaskan, Wyoming). Match to room dimensions + sleep partner needs.
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Our Top Pick in California King: Saatva Classic
The Saatva Classic is our highest-rated innerspring hybrid - available in multiple firmness levels, free white-glove delivery, and a 365-night trial. It fits standard frames and is available in every size including California King.
California King Dimensions at a Glance
| Measurement | Inches | Feet | Centimeters |
|---|---|---|---|
| Width | 72" | 6' | 183 cm |
| Length | 84" | 7' | 213 cm |
| Typical thickness | 9-14" | - | 23-36 cm |
California King vs. Standard King: Dimensions Compared
| Dimension | Standard King | California King | Difference |
|---|---|---|---|
| Width | 76" | 72" | Cal King is 4" narrower |
| Length | 80" | 84" | Cal King is 4" longer |
| Total area | 6,080 sq in | 6,048 sq in | Nearly identical |
The California king trades 4 inches of width for 4 inches of length. For couples, this means each person gets 36 inches of width on a California king versus 38 inches on a standard king. The difference is small, but if you want maximum per-person width, standard king wins.
Who Actually Needs a California King?
The California king is not for everyone. It makes sense for:
- Sleepers 6'2" or taller - The 84-inch length prevents feet from hanging off the end
- Master bedrooms that are longer than wide - California king's narrow-and-long profile can suit certain room proportions better
- Single tall sleepers - The 72-inch width is more than enough for one person
It is not the right choice if neither sleeper is over 6 feet 2 inches, if you value easy sheet shopping, or if you may move and need to re-use the bed in a different room. Standard 80-inch mattresses fit the vast majority of adults comfortably.
The Sheet Problem: Why California King Sheets Are Harder to Find
This is the most underestimated downside of a California king. King-size sheets do not fit. The dimensions are different in both width and length - a king fitted sheet is 4 inches wider and 4 inches shorter than what a California king needs.
California king sheets:
- Are sold as a separate SKU at most retailers
- Are available in fewer color and pattern options than king
- Cost slightly more on average due to lower production volumes
- Use the same pocket depth requirements as king (deep pocket for hybrids)
Before buying a California king mattress, confirm your preferred sheet brand offers California king sizing. Our cotton sheets guide notes which brands carry California king options.
Minimum Room Size for a California King
- Minimum: 12 x 12 feet - workable but tight given the 84" length
- Comfortable: 12 x 14 feet - allows proper foot clearance and side circulation
- Price: From $1,174 (Twin)
- Free white-glove shipping on mattresses and frames; standard on bedding
- ID.me discounts for military, veterans, first responders, teachers, seniors
- Direct-to-consumer pricing (no middleman markup)
- GREENGUARD Gold certified across most product lines
- Ideal with furniture: 13 x 15 feet or larger
Saatva Classic Mattress
3 firmness options · Euro pillow top · 365-night trial · Lifetime warranty. Saatva is one of the few direct-to-consumer brands to offer extended trial windows (45-365 nights depending on product) and long warranties in this category.
Disclosure: we may earn a commission from this link at no extra cost to you.
The extra 4 inches of length (versus a standard king) matters for room planning. Make sure to measure your room's length before committing, especially if you have a window or door near the foot of the bed. See our king mattress dimensions page for the standard king room requirements.
Our Top Pick in California King: Saatva Classic
The Saatva Classic is our highest-rated innerspring hybrid - available in multiple firmness levels, free white-glove delivery, and a 365-night trial. It fits standard frames and is available in every size including California King.
Frequently Asked Questions
Frequently asked questions about this size
Our default pick at this size
Saatva Classic, Cal King $2,199 (was $2,599, −$400)
The Saatva Classic is the most-ordered luxury hybrid on the US market and ships in every standard size. Zoned lumbar support, 365-night home trial, lifetime warranty, free white-glove delivery + old-mattress removal included.
What are the dimensions of a California king?
California king is 72" × 84". 4" narrower than standard king but 4" longer. Originally designed for tall Hollywood sleepers in the 1960s, now standard across North America.
Cal-king vs king: which should you buy?
Go cal-king if: sleepers are 6'2"+, the bedroom is long but narrow, or you want extra foot space for pets. Go standard king if: couples want side-to-side space, sleepers are under 6'0", or the room is wider than it is long.
Is cal-king bedding hard to find?
Less than it used to be, most mainstream brands now carry cal-king sheets, toppers, and protectors, but the selection is 50-70% smaller than standard king. Premium brands (Saatva, PlushBeds) carry full cal-king lines.
What are the exact dimensions of a California king mattress?
A California king mattress measures 72 inches wide by 84 inches long (183 cm x 213 cm). It is 4 inches narrower but 4 inches longer than a standard king.
Who should choose a California king over a standard king?
California king is the best choice for sleepers taller than 6 feet 2 inches who regularly find their feet hanging off the end of an 80-inch mattress.
What is the minimum room size for a California king?
The minimum recommended room size for a California king is 12 x 12 feet. A 12 x 14 foot room is more comfortable.
Do king sheets fit a California king?
No. King sheets do not fit a California king. The lengths differ by 4 inches and the widths differ by 4 inches. Always buy California king-specific sheets.
Is a California king bigger than a king?
By total square footage they are nearly equal. The California king is longer (84" vs 80") but narrower (72" vs 76"). For most couples, a standard king offers more usable per-person space.
Key Takeaways
- California King Dimensions at a Glance: a key factor in making the right sleeping decision.
- California King vs. Standard King: Dimensions Compared: a key factor in making the right sleeping decision.
- It is the longest standard mattress size available in the United States.
- For the full comparison of these two sizes, see our dedicated California king vs.
- It fits standard frames and is available in every size including California King.
Our Top Pick: Saatva Classic
Voted best luxury innerspring mattress with exceptional lumbar support and white-glove delivery.
Saatva Classic
If this guide answered the sizing or setup question, this is the matching partner path to check next.