A Cali king mattress measures 72 x 84 inches: 4 inches narrower than a standard king, and 4 inches longer. The whole point of the size is those 4 inches of length. For sleepers over about 6 foot 2, whose feet hang off an 80-inch mattress, 84 inches is the difference between sleeping straight and sleeping diagonal.
Cali king is also a smart fit for rooms that run longer than they are wide, where a 76-inch-wide standard king makes the room feel cramped side to side. Two sleepers still get 36 inches of personal width each, 6 more than a queen.
We stock fewer Cal king models than standard sizes, and we'd rather say that plainly than dress it up: the selection here is smaller than our king lineup, built from the same brands and quality tiers we carry everywhere else. What is here can be seen and tested at a Sleep Center near you before you commit.
From the Furniture Fair Sleep Center
"Tall people get sold the wrong size constantly, and it always comes down to one question: where do your feet end up? If your feet hang off an 80-inch king, no mattress on that floor fixes it, because it's a length problem, not a comfort problem. The Cal king's 84 inches solves it outright. The trade is 4 inches of width, and in my experience almost no couple ever notices it. Measure the sleeper first, then the room, then worry about the mattress."
Robbie Daniels, Head Mattress Buyer, Furniture Fair
Cali King Mattress Dimensions Compared to Other Sizes
Standard mattress size dimensions in inches
Size
Dimensions (W x L)
Per-Sleeper Width
Best For
Twin
38 x 75
38 inches
Kids, bunk beds, guest rooms
Twin XL
38 x 80
38 inches
Taller singles, adjustable bases
Full
54 x 75
27 inches
Single sleepers, smaller rooms
Queen
60 x 80
30 inches
Couples, master bedrooms
King
76 x 80
38 inches
Couples wanting maximum space
Cal King
72 x 84
36 inches
Tall sleepers, long rooms
Is a Cali King the Right Size for Your Room?
A Cal king bed needs a room of roughly 12 x 12 feet, the same footprint class as a standard king. The difference is shape: in a long, narrow bedroom the Cal king is the better fit, while in a wide room the standard king's extra 4 inches of width may fit better. Measure the delivery path carefully, since the 84-inch length has to make every stairwell turn and doorway on the way in.
How Much Does a Cali King Mattress Cost?
Cal king carries a higher entry point than standard king, typically from around two thousand dollars for a starter Cal king through several thousand for a luxury hybrid. The reason is volume: the budget models that put a standard king in the mid hundreds are rarely made in Cal king, so the size starts one tier up. Worth knowing: every brand we carry in Cal king builds it to the same spec as its king counterpart, so a smaller count does not mean a lower quality bar. Cal king frames and bedding also cost about the same as king, though with fewer style options on the bedding side. Budget the mattress, frame, and bedding together, same as any size.
Choosing a Cali King Mattress: What Actually Matters
If you have already decided on Cal king, the length question is settled, so the decision is about the sleeper inside:
Motion isolation: on any shared 72 inches, a mattress that absorbs a partner's movement is worth paying for.
Sleep temperature: two sleepers run warm, so cooling covers and breathable foams earn their keep.
Firmness for tall bodies: heavier frames need firmer support to keep the spine aligned, which bedMATCH pressure mapping shows clearly.
Edge support: strong edges keep the full 84 inches usable for tall sleepers who use every inch.
Visit a Sleep Center at Furniture Fair and lie on the finalists. Tall sleepers especially should test full stretch-out, since that is the position this size exists for.
Cali King Beds, Frames & Foundations
Our Cal king bed frames are built for the 72 x 84 footprint, from simple foundations to upholstered headboards and storage beds. The frame must be rated for Cal king specifically: a king frame is 4 inches too wide and 4 inches too short, and the mismatch is visible and bad for the mattress.
Like any king-class frame, Cal king frames need center support under the middle of the span, which most quality frames include and which matters for warranty coverage. If an adjustable base is in the plan, check the specific model's Cal king compatibility, since there is no split Cal king standard the way there is for regular kings.
Cali King Bedding & Comforters
Cal king bedding is cut longer and narrower than king: comforters are typically made around 98 to 107 inches wide by 96 to 100 inches long for a 72 x 84 mattress. King bedding will not fit properly, and it is easy to get wrong.
Fewer brands make Cal king bedding, but the ones that do cover the full range of fills and styles. Down for softness and breathability, synthetic for allergies and easy washing. Browse our bedding collection for Cal king comforters, sheets, pillows, and protectors.
Frequently Asked Questions About Cali King Mattresses, Beds & Bedding
A California king mattress measures 72 inches wide by 84 inches long. It is 4 inches narrower and 4 inches longer than a standard king, which is 76 x 80.
A standard king is 76 x 80, giving each of two sleepers 38 inches of width. A Cal king is 72 x 84, trading 4 inches of width for 4 inches of length. Tall sleepers want the Cal king's length, couples who value width want the standard king.
Not in total area. The two sizes cover almost identical square footage, the Cal king just distributes it differently: longer and narrower instead of wider and shorter. Choose based on sleeper height and room shape, not on which sounds bigger.
Sleepers over about 6 foot 2, whose feet hang off an 80-inch mattress, and bedrooms that are longer than they are wide. The 84-inch length fits tall sleepers comfortably, and the 72-inch width still gives a couple 36 inches each.
A Cal king bed needs a room of roughly 12 x 12 feet, the same footprint class as a standard king, but it is the better fit in rooms that run long and narrow where a 76-inch-wide king feels cramped. Measure the delivery path too, since the 84-inch length has to make every turn.
Most Cal king mattresses work with adjustable bases, especially hybrid and memory foam models. There is no split Cal king standard the way there is for regular kings, so check the specific mattress and base compatibility before buying.
No. Cal king comforters and sheets are cut longer and narrower for a 72 x 84 mattress, and king bedding will not fit properly. Cal king bedding is made by fewer brands, so confirm the size before buying.
Shop Cali King Mattresses at Furniture Fair
Our Cali king mattresses are laid out Good, Better, Best so you can see exactly what changes as you move up. Our free interior design services can help you plan the bedroom, and our Sleep Center teams can match you to the right mattress with bedMATCH. Need help getting it home? We deliver with our own crews. Nobody carries a Cal king mattress up stairs for a living and enjoys it, so leave that part to us.
Related Categories
Depending on where you are in the decision, one of these is your next stop: