Olympic Queen Mattress: Size, Fit & Alternatives
An Olympic queen mattress measures 66 inches wide by 80 inches long — six inches wider than a standard queen (60" x 80") and ten inches narrower than a standard king (76" x 80"). The length is identical to a queen, king, and twin XL, so the extra room is all side-to-side. It is a real, established size, but it is a specialty one: most manufacturers don't produce it, most stores don't stock it, and sheets have to be bought specifically for it. Below is what the size actually gives you, where it gets complicated, and how to decide whether it's worth hunting down.
Olympic queen dimensions at a glance
| Size | Width | Length | Surface per sleeper (couple) |
|---|---|---|---|
| Full | 54" | 75" | 27" each |
| Queen | 60" | 80" | 30" each |
| Olympic queen | 66" | 80" | 33" each |
| King | 76" | 80" | 38" each |
| California king | 72" | 84" | 36" each |
In feet, an Olympic queen is 5'6" x 6'8". You'll also see it called an "expanded queen" — same 66" x 80" footprint, different marketing name. It is not the same thing as an Olympic king or a "super queen," terms that different brands use inconsistently, so always confirm the actual inch measurements rather than trusting the label.
How an Olympic queen compares to the sizes you can actually buy
Olympic queen vs. queen
The difference is six inches of width — three inches per person for a couple. That sounds small, and on paper it is. In practice, three inches per side is roughly the width of your upper arm, which is enough to stop the "we keep bumping elbows" problem for some couples without changing the room footprint much. If you currently sleep on a queen and feel cramped but not desperate, this is the gap you're trying to close. Everything else about the two sizes — length, headboard height considerations, mattress thickness options — is the same.
Olympic queen vs. king
A king gives each person 38 inches of width versus 33 on an Olympic queen — five more inches each, at the cost of ten more inches of floor space. If your room can take a king, a king is almost always the better buy, because the mattress, the sheets, the protector, the frame, and the adjustable base are all standard items you can walk in and buy today. The Olympic queen only wins when those last ten inches genuinely won't fit.
Olympic queen vs. California king
A California king is 72" x 84" — narrower than a king but four inches longer. If your reason for shopping is height rather than shoulder room, a California king is the size to look at instead. An Olympic queen adds nothing in length over a standard queen.
Who an Olympic queen actually suits
There is a narrow but real case for this size:
- Couples in a room that can't take a king. A king needs about 76 inches plus walking clearance on both sides. In a 10' x 10' bedroom with a closet door or a walkway on one side, those extra ten inches can be the difference between a usable room and a room you shuffle sideways through. An Olympic queen buys width without that penalty.
- Anyone replacing an existing Olympic queen. If you already own the frame and the sheets, matching the size is the path of least resistance.
- Specialty RV and marine layouts. Some coach and boat builders spec a 66-inch platform, which is where a lot of Olympic queen demand comes from.
For everyone else — most people, honestly — the choice is between a queen and a king, and the deciding factor is the room, not the mattress.
The catch: availability and bedding
Finding the mattress
Olympic queen is not part of the standard size run for most mattress brands. The major brands sold in mattress showrooms typically build twin, twin XL, full, queen, king, California king, and split king. If you want 66" x 80", you are usually looking at a custom or made-to-order mattress, a longer lead time, and a price that isn't tied to normal size-tier pricing. Ask for the lead time in writing before you commit.
Finding sheets and protectors
This is the part that catches people out. Queen sheets are cut for a 60-inch mattress; on a 66-inch bed they will not tuck, and a fitted sheet will pop off the corners. King sheets are cut for 76 inches and will bunch. You need sheets sold specifically as Olympic queen or expanded queen, and the selection is small. The same applies to mattress protectors, encasements, and quilted pads. Budget for buying two sets up front, because restocking a specialty size later is harder than it sounds. If you're comparing the everyday cost of ownership, browse a normal sheet set selection to see how much wider the choice is at standard sizes.
Frames and foundations
Bed frames, foundations, headboards, and adjustable bases are also built to standard sizes. A 66-inch mattress on a queen frame overhangs three inches per side, which stresses the edges and looks wrong; on a king frame it leaves five inches of exposed rail per side. Either you get a custom frame built to match, or you accept a compromise. Adjustable bases are the hardest of these — they're engineered to specific deck widths, and a mismatched mattress won't articulate properly.
What most people should buy instead
If you've read this far and the availability problem is putting you off, the practical decision tree is short:
- Measure the room first. Plan for at least 24 to 30 inches of walking clearance on any side you need to walk down, and check that doors and closets still swing clear.
- If a 76-inch bed fits, buy a king. Standard pricing, standard bedding, immediate availability. Our king mattresses cover foam, hybrid, and latex builds across firmness levels.
- If it doesn't fit, buy a queen and spend the difference on the mattress itself. A better-built queen mattress with real motion isolation often solves the problem people are trying to fix with extra width, because what actually wakes couples up is movement transfer, not three inches of shoulder room.
- If you need length, not width, look at California king rather than Olympic queen.
For exact measurements on every standard size in one place, see our mattress dimensions and size guide, or read the detailed queen mattress dimensions breakdown if the queen is your likely landing spot.
Frequently asked questions
What are the exact dimensions of an Olympic queen mattress?
66 inches wide by 80 inches long, or 5'6" x 6'8". Thickness varies by model, the same as any other size.
Will queen sheets fit an Olympic queen bed?
No. Queen fitted sheets are cut for a 60-inch width and will not stay on a 66-inch mattress. You need sheets labeled Olympic queen or expanded queen.
Is an Olympic queen the same as an expanded queen?
Yes — both names refer to a 66" x 80" mattress. Because naming isn't standardized across brands, confirm the inch measurements on any listing before ordering.
Is an Olympic queen worth it over a standard queen?
It's worth it if the extra six inches of width is the specific thing solving your problem and a king genuinely won't fit your room. If a king fits, a king is the easier and usually better purchase, since bedding and frames are readily available.
Do adjustable bases come in Olympic queen?
Not as a standard item. Adjustable bases are built to standard deck widths, so an Olympic queen mattress generally won't pair correctly with an off-the-shelf base.
Not sure which size your room can take?
The fastest way to settle a size question is to lie down on the options side by side. Come see us at the Jewel City Mattress showroom in Glendale — we'll measure against your room dimensions, walk you through queen versus king in person, and tell you honestly if a specialty size is worth chasing. Every mattress comes with a 120-night sleep trial, and we offer free delivery and setup across the Los Angeles area, so you can be sure of the size before you live with it.