Bed Sheet Size Guide
Finding the right sheet size ensures a smooth, snug fit that stays in place all night. Use our guide to match your mattress dimensions with the perfect sheet set.
Standard Sheet Sizes
| Mattress Size | Dimensions | Fitted Sheet | Flat Sheet | Pillowcases | Best For |
|---|---|---|---|---|---|
| Twin | 39" x 75" | 39" x 75" | 66" x 96" | 1 Standard | Kids, dorms, daybeds |
| Twin XL | 39" x 80" | 39" x 80" | 66" x 102" | 1 Standard | College dorms, taller teens |
| Full / Double | 54" x 75" | 54" x 75" | 81" x 96" | 2 Standard | Guest rooms, single adults |
| Queen | 60" x 80" | 60" x 80" | 90" x 102" | 2 Standard | Couples, master bedrooms |
| King | 76" x 80" | 76" x 80" | 108" x 102" | 2 King | Couples wanting extra space |
| California King | 72" x 84" | 72" x 84" | 108" x 102" | 2 King | Taller individuals, narrow rooms |
Mattress Depth Compatibility
The most common reason sheets pop off the corners is incorrect pocket depth. Measure the height of your mattress (including any topper) to determine which pocket depth you need.
Standard
Standard innerspring mattresses, most traditional mattresses
Standard pocket sheets
Deep Pocket
Pillow-top mattresses, memory foam mattresses, hybrid mattresses with toppers
Deep pocket sheets
Extra Deep Pocket
Extra-thick pillow tops, mattress + thick topper combos, adjustable air mattresses
Extra deep pocket sheets
Which Size Do I Need?
Single sleeper, standard bed
Twin or Full. Full gives more room to spread out.
Single sleeper, tall person (6ft+)
Twin XL for dorms, Queen for maximum comfort.
Couple, standard room
Queen is the most popular choice for couples. Plenty of space for two.
Couple, want maximum space
King. 16 inches wider than a Queen — each person gets almost the width of a Twin.
Couple, one partner is tall
California King. 4 inches longer than a standard King, narrower by 4 inches.
Kids room or daybed
Twin. The standard size for children's beds and daybeds.
Tips for Measuring Your Mattress
Measure the mattress, not the bed frame
Place your tape measure on the top surface of the mattress and measure width (side to side) and length (head to foot). Do not include the bed frame or headboard.
Measure height from the floor up
Place your tape measure at the base of the mattress (where it meets the box spring or platform) and measure straight up to the highest point of the mattress top. Include any mattress topper you use.
Add 2 inches to your depth measurement
For the best fit, choose sheets with a pocket depth at least 2 inches greater than your mattress height. This allows for a snug tuck under the mattress without pulling at the corners.
Check your mattress topper
If you use a mattress topper (memory foam, featherbed, etc.), add its thickness to your mattress height before selecting sheet pocket depth.
What is Pocket Depth?
Pocket depth refers to the height of the elasticized pocket on a fitted sheet — the part that wraps around and under your mattress. A fitted sheet with a 15-inch pocket depth can comfortably fit a mattress up to about 15 inches tall. If your mattress is taller than the pocket depth, the sheet will not reach under the corners and will pop off during the night.
All Royal Bedding Tex fitted sheets feature strong, durable elastic that runs the entire perimeter (not just the corners), ensuring a secure fit that stays put even for restless sleepers. Our standard sheets fit mattresses up to 16 inches, while our deep pocket options accommodate mattresses up to 18 inches.
Find Your Perfect Fit
Browse our collections and choose your size at checkout.