Quilt sizes are not mattress sizes. Here are typical dimensions for every size, how to work out the drop you need, and why a deep mattress changes the math.
Here is the thing that trips people up: a queen quilt is not 60 by 80 inches. Quilt sizes are not mattress sizes. They are coverage sizes, built to drape over the sides of the bed with enough left over to reach the pillows, which is why a queen quilt runs closer to 90 by 92 inches. Buy by mattress size alone and you end up with a quilt that stops six inches short of where you wanted it.
This guide gives typical dimensions for every size, then shows you how to check the number against your own bed, which matters more than any chart once your mattress passes about 12 inches deep.
A quilt is three layers stitched together as one piece: a top layer (pieced from smaller sections, or a single whole cloth), a middle layer of batting, and a backing. The stitching that runs through all three is the quilting, and it is what holds the batting in place and gives a quilt its flat, textured surface.
That construction is why a quilt behaves differently from the other things on your bed:
These are the sizes most retail bedding brands use. Treat them as a starting point rather than a standard, because quilt sizing is not federally regulated the way crib mattresses are, and handmade and craft-pattern quilts often run different again.
| Size | Typical quilt dimensions | Mattress it fits | Approximate drop per side |
|---|---|---|---|
| Baby / crib | 36" x 52" | Crib, about 27" x 52" | Sized as a cover, not a drape |
| Lap / throw | 50" x 65" | Not bed sized | Chair and sofa use |
| Twin | 68" x 88" | 38" x 75" | About 15" |
| Twin XL | 68" x 92" | 38" x 80" | About 15" |
| Full / double | 84" x 88" | 54" x 75" | About 15" |
| Queen | 90" x 92" | 60" x 80" | About 15" |
| King | 104" x 92" | 76" x 80" | About 14" |
| California king | 104" x 96" | 72" x 84" | About 16" |
Notice the length column. Almost every bed-size quilt adds only about 12 to 13 inches to the mattress length, and that allowance is meant to be split between a tuck at the head and a short drop at the foot. If you like a deep tuck under the pillows, you get almost nothing hanging at the foot. Something has to give.
If you need the mattress dimensions themselves, our mattress size comparison chart lays out every size in one place.
Two measurements and a decision.
Step one: measure your mattress width and length. Not the frame, the mattress.
Step two: measure the mattress depth, from the top surface down to the bottom edge. Include any topper you use, because the topper adds to the height the quilt has to cover.
Step three: decide where you want the edge to land. Just past the bottom of the mattress is the most common choice, particularly if you use a bed skirt. Down to the frame rail is the more tailored look. To the floor is a bedspread, not a quilt, and you will need a much larger size.
Then: quilt width = mattress width + (2 x the drop you want). For length, add the drop you want at the foot plus 10 to 12 inches if you plan to tuck the top under the pillows.
This is where the chart falls apart for a lot of modern beds. A queen quilt at 90 inches wide gives you a 15 inch drop. That was generous when mattresses were 8 or 9 inches deep. On a 14 inch hybrid, a 15 inch drop clears the mattress by a single inch, and if you add a 3 inch mattress topper the quilt no longer reaches the bottom of the mattress at all.
If your mattress plus topper is over about 13 inches, size up. A king quilt on a queen bed is a common and perfectly good fix, and it also solves the other classic complaint, which is one person pulling all the covers.
A quilt is arguably the right primary cover for this climate. It is warm enough for most of the year without the heat trap of a lofted down comforter, it breathes, and it washes at home, which a king comforter mostly does not.
Two practical notes. Cotton batting sleeps cooler and gets softer with every wash but wrinkles readily. Polyester batting holds loft longer, resists wrinkling, and costs less, but traps more heat. If you run warm at night, cotton or a cotton blend is the better call, and the same logic that applies to sheet fabric and thread count applies here: breathability beats specification numbers.
Most machine-washable quilts want cold water, a gentle cycle, and a mild detergent without bleach or fabric softener. Wash it alone so it has room to move, since a quilt crammed into a full drum will not rinse properly and can tear at the seams.
Dry on low heat, or better, dry it flat or over a rack. Heat is what breaks down batting and causes the shrinkage that makes a quilt pucker. A queen or king quilt often exceeds a home machine's capacity, in which case a laundromat's large-capacity front loader is the safer option than forcing it into a top loader with an agitator.
Vintage, hand-pieced or heirloom quilts should be spot cleaned or hand washed in a bathtub, and never wrung out. Support the weight when you lift a wet quilt or the stitching takes the strain.
A quilt is a bed cover made of three layers stitched together as one: a decorative top, a middle layer of batting, and a backing. The stitching runs through all three layers, which is what distinguishes a quilt from a comforter, where loose fill sits inside sewn channels.
Typically about 90 by 92 inches. That covers a 60 by 80 inch queen mattress with roughly 15 inches of drop on each side and about 12 inches of extra length to split between a pillow tuck and a foot drop. Brands vary, so check the listed dimensions rather than assuming.
Around 104 by 92 inches for a standard king, and about 104 by 96 inches for a California king, which is narrower but four inches longer. Both give roughly 14 to 16 inches of drop per side on the matching mattress.
About 68 by 88 inches, which fits a 38 by 75 inch twin mattress with roughly 15 inches of drop per side. For a twin XL, look for around 68 by 92 inches to cover the extra five inches of length.
Yes, considerably. Quilts are sized for coverage, so a bed-size quilt runs roughly 28 to 32 inches wider than the mattress and 12 to 13 inches longer. If a listed quilt matches your mattress dimensions exactly, it is a coverlet or a mattress-top piece, not a full quilt.
Cold water, gentle cycle, mild detergent, no bleach or fabric softener, and washed on its own so it can move freely. Dry on low heat or flat over a rack, because high heat damages batting and causes puckering. Large quilts often need a commercial-capacity machine rather than a home one.
Size up one step. On a mattress deeper than about 13 inches, or any mattress with a thick topper, a standard drop no longer reaches the bottom edge. A king quilt on a queen bed, or a California king quilt on a king, restores the drape.
Bedding is the easy layer to change. If the mattress under it is sagging, eight or more years old, or simply the wrong firmness for how you sleep, no quilt fixes that. Take our sleep quiz to see what suits your sleep position, or come compare firmness levels in person at any of our five Los Angeles showrooms. Same-day delivery is available across most of LA.
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