Measure Width
Measure straight across the mattress from one side to the other at its widest point.
Restovia Fit & Layering Reference
Bedding Size Guide
Choosing the right bedding starts with the mattress, but mattress width and length are only part of the fit. Mattress depth, topper thickness, desired drape, pillow dimensions, and the way you like to layer a bed can all change which size feels right.
This guide uses common U.S. nominal mattress dimensions as a starting point and then shows what to measure before choosing sheets, duvet covers, comforters, protectors, toppers, pillows, and decorative layers.
Start with the bed itself
Measure Before You Choose
Labels such as Queen or King are helpful, but measuring the actual mattress gives you a better foundation for fit. This matters especially when the mattress is unusually deep, has a substantial topper, or sits inside a frame that affects how much fabric can drape over the sides.
Measure Length
Measure from the head of the mattress to the foot without following any curve in the bedding.
Measure Depth
Measure from the top sleeping surface to the bottom edge of the mattress, including any topper you keep on the bed.
Decide the Drape
For flat sheets, quilts, coverlets, comforters, and duvets, decide how far you want the fabric to fall over each side.
Always compare the dimensions listed on the individual Restovia product page with your own measurements. Bedding dimensions can vary by product style, construction, and intended drape.
Common U.S. dimensions
Standard Mattress Size Reference
The measurements below are common nominal U.S. mattress dimensions. Actual mattresses can differ slightly, and mattress depth is not standardized, so use these figures as a starting point rather than a substitute for measuring your bed.
Mattress Size
Approx. Dimensions
Useful Fit Notes
Twin
38 x 75 in
Compact single-sleeper size commonly used in children's rooms, guest rooms, daybeds, and smaller spaces.
Twin XL
38 x 80 in
Same approximate width as Twin with about 5 additional inches of length; often used in dorm-style or taller-sleeper setups.
Full / Double
54 x 75 in
Wider than Twin while keeping the shorter 75-inch length; useful where room width is limited.
Queen
60 x 80 in
A common primary-bedroom size with additional length compared with Full and more width than Twin XL.
King
76 x 80 in
Wide sleeping surface; verify comforter, duvet, and flat-sheet widths if you prefer generous side drape.
California King
72 x 84 in
Narrower than a standard King but about 4 inches longer; use California King-specific fitted pieces where required.
A split King setup commonly uses two Twin XL mattress sections. Fitted sheets may therefore be purchased as two Twin XL pieces, while the top layer may be King-sized depending on the bed configuration.
The closest layer to the mattress
Fitted and Flat Sheet Fit
Fitted sheets need the correct mattress footprint and enough pocket depth. Flat sheets are more flexible because their fit depends on how much side and foot drape you want and whether you tuck them under the mattress.
Match the Mattress Size
Use the mattress label and measurements to choose the fitted-sheet size. Twin XL and California King should not be substituted with their shorter counterparts.
Check Pocket Depth
Measure the total mattress depth with any topper that remains on the bed. The fitted-sheet pocket must be deep enough to reach securely beneath the mattress edge.
Plan the Flat-Sheet Drop
A larger flat sheet can provide more side drape or tucking room, while a more tailored fit creates a cleaner, lighter layer.
- Measure depth at more than one point if the mattress edge is rounded or the topper compresses unevenly.
- If the fitted sheet repeatedly lifts at the corners, compare the pocket depth with the full mattress-plus-topper depth.
- For flat sheets, add the mattress width plus twice the side drop you want to estimate the minimum useful sheet width.
Top-of-bed dimensions
Duvets, Comforters and Quilts
Unlike fitted sheets, top-of-bed layers are partly a styling choice. Two products labeled for the same mattress size can have different finished dimensions, so the actual width and length matter more than the label alone.
- For a tailored look: choose dimensions that cover the mattress surface with a moderate drop over the sides.
- For a fuller hotel-style look: choose a wider top layer when the product dimensions allow enough side coverage for your mattress height.
- For tall mattresses: remember that extra mattress depth uses more of the comforter or duvet width before the fabric reaches the side of the bed.
- For duvet covers: compare the cover dimensions with the duvet insert dimensions rather than relying only on the mattress size name.
A duvet cover that is too large for its insert can look loose or uneven, while a cover that is too small can compress the insert. The closest dimension match generally produces the most balanced fill.
Pillow and sham reference
Common Pillow Dimensions
Pillow dimensions vary by manufacturer and fill, but the measurements below are common U.S. references. Always compare the pillow size with the pillowcase or sham dimensions shown on the product page.
Standard
Approx. 20 x 26 in. Often used on Twin, Full, and Queen beds depending on the styling arrangement.
Queen
Approx. 20 x 30 in. Slightly longer than Standard and commonly paired with Queen beds.
King
Approx. 20 x 36 in. Designed for the wider visual scale of King beds and long pillow arrangements.
Body Pillow
Often around 20 x 54 in, although body and support pillow dimensions vary widely by shape and intended use.
The hidden layers
Protectors, Toppers and Mattress Pads
Mattress protectors, toppers, and pads sit beneath the visible bedding but can change the total depth of the bed. A thick topper can be the difference between a fitted sheet that stays secure and one that rides up at the corners.
Protectors
Match the mattress footprint and verify the supported depth range. Encasement styles should accommodate the full mattress height without excessive tension.
Toppers and Pads
Match the top surface dimensions of the mattress. Then remeasure the combined depth before choosing a fitted sheet or fitted protector.
If you add or remove a topper later, recheck fitted-sheet depth. The mattress size name may stay the same while the required pocket depth changes significantly.
Quiet luxury through proportion
Layering the Bed by Size
Once the functional fit is correct, proportion becomes a design choice. The most refined bedding arrangements usually repeat the same logic across layers: fitted pieces stay controlled, while flat sheets, quilts, comforters, throws, and runners add progressively more visual movement.
Keep the Base Precise
Fitted sheets, protectors, and mattress pads should sit securely without loose fabric bunching around the corners.
Control the Main Drape
Choose duvet, comforter, quilt, or coverlet dimensions based on mattress width, mattress height, and the side drop you want.
Finish With Flexible Layers
Throws and bed runners do not need to match the mattress footprint exactly; use proportion and placement to create the desired visual weight.
Common fit questions
Bedding Size Guide FAQs
Are all Queen mattresses exactly 60 x 80 inches?
60 x 80 inches is a common U.S. nominal Queen dimension, but actual mattresses can vary slightly. Mattress depth also varies considerably, so measure your own mattress before choosing fitted bedding.
How do I know what fitted-sheet pocket depth I need?
Measure from the top sleeping surface to the bottom edge of the mattress, including any topper that stays on the bed. Compare that measurement with the fitted-sheet depth information on the product page.
Can I use Twin sheets on a Twin XL mattress?
A standard Twin is typically about 5 inches shorter than a Twin XL. A Twin fitted sheet may therefore be too short for a Twin XL mattress. Choose Twin XL-specific fitted pieces where required.
Is California King the same as King?
No. A common King is approximately 76 x 80 inches, while a California King is approximately 72 x 84 inches. California King is narrower and longer, so fitted pieces should match the correct mattress shape.
Should my duvet be the exact same size as my mattress?
No. A duvet or comforter needs additional width and length to cover the mattress and create side and foot drape. Compare the finished product dimensions with your mattress measurements and preferred styling.
Can I size up a comforter for more drape?
Sometimes, but check the actual dimensions first. Sizing up can create a fuller look, yet too much width or length may overwhelm a lower bed frame or create uneven proportions.
Which pillowcase size should I choose?
Match the pillowcase dimensions to the pillow dimensions shown on the product page. Standard, Queen, and King pillows differ mainly in length, and specialty support pillows can vary much more.
24/7 customer support
Need Help Choosing a Size?
If you are comparing sheet sizes, pocket depth, pillow dimensions, duvet or comforter coverage, mattress protectors, or topper fit, Restovia customer support is available 24/7.
Before requesting help, measure the mattress width, length, and total depth and keep the product name or product dimensions you are considering available.