A mattress protector needs to match your mattress size exactly and have a skirt deep enough to stay anchored to your mattress thickness. Canadian bed sizes follow standard dimensions: twin (38 x 75 inches), double (54 x 75 inches), queen (60 x 80 inches), king (76 x 80 inches), and California king (72 x 84 inches). The most common sizing mistake is buying the right size protector with the wrong skirt depth. Measure your mattress thickness before ordering.
Shop our Bamboo Mattress Protector today and enjoy natural breathability, soft comfort, and long-lasting bed protection designed to improve sleep quality while keeping your mattress fresh and clean.
In This Guide
→ Canadian Mattress Sizes at a Glance
→ Why Skirt Depth Matters More Than Size
→ Size Guide by Mattress Type
→ Split King and Non-Standard Sizes
→ Fitted Protector vs Encasement Sizing
→ FAQs
Reading Time: 7 minutes
Ordering a mattress protector the wrong size is one of the most common and easily avoided bedding mistakes. A protector that is too small will not stay anchored through the night. One with a skirt that is too shallow will pop off the corners by morning, leaving sections of the mattress exposed. Getting the size right is a two-step process: match the surface dimensions, then confirm the skirt depth against your actual mattress thickness.
This guide covers every standard Canadian mattress size, the skirt depth ranges you need for each mattress type, and the specific situations where sizing gets more complicated, including pillow-top mattresses, toppers, and split king setups.
Protect your bed with a high-quality Waterproof Mattress Protector that blocks spills, stains, and moisture effectively, helping extend mattress life while ensuring hygienic and worry-free sleep every night.
Canadian Mattress Sizes at a Glance
| Size |
Dimensions (inches) |
Typical Depth Range |
Skirt Needed |
Best For |
| Twin |
38 x 75 |
8 to 12 inches |
10 to 14 inch skirt |
Single sleeper, child's bed |
| Twin XL |
38 x 80 |
8 to 14 inches |
10 to 16 inch skirt |
Taller sleepers, dorm beds |
| Double / Full |
54 x 75 |
8 to 14 inches |
10 to 16 inch skirt |
Single adult, guest room |
| Queen |
60 x 80 |
10 to 16 inches |
12 to 18 inch skirt |
Couples, most households |
| King |
76 x 80 |
10 to 16 inches |
12 to 18 inch skirt |
Couples needing more width |
| California King |
72 x 84 |
10 to 16 inches |
12 to 18 inch skirt |
Taller couples |
Why Skirt Depth Matters More Than Size
The surface dimensions of a mattress protector match the mattress size: a queen protector covers a 60 by 80 inch surface. What varies is the depth of the elasticized skirt that wraps around the sides and holds the protector in place. That measurement needs to be equal to or greater than the actual thickness of your mattress.
A standard innerspring mattress typically runs 8 to 12 inches deep. A hybrid mattress with a thick comfort layer often runs 12 to 14 inches. A mattress with a pillow top adds 2 to 4 inches on top of that base depth. If you add a mattress topper, you need to account for that thickness as well, since the protector goes over the topper.
Upgrade your bedding experience with a durable Terry Mattress Protector offering soft surface comfort, absorbent layers, and reliable protection, making it ideal for everyday use and family households.
Most protectors list a maximum depth on the product page. If your mattress is 14 inches deep and the protector skirt only reaches 12 inches, the corners will pull loose during the night and the edges of the mattress will be unprotected. Measure your mattress from the floor-facing surface to the top sleeping surface before you order.
"The most common return reason we see for protectors is the wrong skirt depth, not the wrong size. People measure the width and length correctly but do not account for how thick their mattress actually is. A 14 or 16-inch hybrid needs a deep-pocket skirt."
— David, product specialist at Beddora
Size Guide by Mattress Type
Standard innerspring (8 to 12 inches)
A protector with a 12-inch skirt fits most standard innerspring mattresses comfortably. If your mattress is on the thinner side, a 10-inch skirt is sufficient. Avoid overshooting significantly on skirt depth for thin mattresses as excess fabric bunches at the corners.
Hybrid mattress (12 to 16 inches)
Hybrids combine coil systems with thick foam comfort layers and typically measure 12 to 16 inches. You need a deep-pocket protector with a skirt of at least 14 inches. Confirm the exact depth of your specific mattress model before ordering.
Memory foam mattress (10 to 14 inches)
Memory foam mattresses sit in a similar depth range to hybrids but without the height variation that coil systems can add. A 12 to 14-inch skirt covers most memory foam options. All-foam mattresses also benefit most from a waterproof protector because liquid that reaches foam cannot be extracted.
Pillow-top mattress (14 to 18 inches)
The pillow top adds a sewn-on comfort layer to the top of the mattress that typically adds 2 to 4 inches to the base depth. A standard queen mattress with a pillow top often measures 15 to 18 inches total. You need a deep-pocket protector with an 18-inch or deeper skirt to stay anchored.
Mattress with a topper (add topper depth to mattress depth)
When you place a topper on your mattress, the protector goes over both. Add the topper thickness to your mattress depth to get the total measurement your skirt needs to accommodate. A 12-inch mattress with a 3-inch topper requires a skirt of at least 15 inches.
Split King and Non-Standard Sizes
A split king is two twin XL mattresses placed side by side. Each measures 38 by 80 inches, and each needs its own twin XL protector. You cannot use a single king protector on a split king setup. The king surface dimensions are 76 by 80 inches, which matches the combined surface of two twin XLs, but a single protector cannot wrap around and anchor to two separate mattresses.
RV mattresses, cot mattresses, and custom mattresses use non-standard dimensions that do not correspond to the sizes above. For these, measure the length, width, and depth precisely and look for a protector listed with those specific dimensions or contact the retailer before ordering. A protector that does not match the surface dimensions cannot provide complete coverage regardless of skirt depth.
Give your baby safe and clean sleep with a certified Premium Crib Mattress Protector designed for comfort, waterproof safety, and easy maintenance, ensuring protection against leaks and allergens.
Fitted Protector vs Encasement Sizing
A fitted protector sizes the same way described above: match the surface dimensions and confirm the skirt depth. An encasement covers all six sides of the mattress and closes with a zipper, so the sizing works differently. The encasement needs to be large enough to slide the mattress into without forcing it, but not so large that the fabric bunches around the sides and creates stress on the zipper.
Most encasements list the mattress dimensions they accommodate and the maximum mattress depth the zipper closure can handle. For a standard queen mattress up to 12 inches deep, a queen encasement sized to those specifications will fit correctly. For a thick hybrid or pillow-top queen, confirm the maximum depth specification on the encasement before ordering.
Get complete 360° protection with a secure Zippered Mattress Encasement that fully seals your mattress from bed bugs, dust mites, and spills while maintaining breathability and long-term durability.
Frequently Asked Questions
What is the difference between a queen and a full mattress protector?
A full protector covers a 54 by 75 inch surface. A queen protector covers a 60 by 80 inch surface. The queen is wider and longer. A full protector placed on a queen mattress will not reach the edges and will pull loose from the corners. Always match the protector size to the mattress size exactly and use the actual name printed on your mattress tag to confirm which size you have.
Can I use a king protector on a California king mattress?
No. A king mattress measures 76 by 80 inches and a California king measures 72 by 84 inches. They have the same total area but different proportions. A king protector is wider and shorter than a California king mattress. It will not fit correctly on either dimension and will not stay anchored. California king is a specific size that requires a California king protector.
My mattress is 15 inches deep. What skirt depth do I need?
You need a protector with a skirt of at least 15 inches, and ideally 16 to 18 inches for comfortable anchoring with some margin. A skirt that exactly matches the mattress depth will stay in place initially but may pull off corners over time as it wears and stretches slightly. Check the product listing for the maximum mattress depth the skirt accommodates, not just the skirt length measurement.
Do I measure my mattress depth with or without the topper?
Measure with the topper in place if you plan to put the protector over both. The protector goes on last, over the topper, so the skirt needs to wrap around the combined depth of the mattress and the topper. If you measure only the mattress and order a protector based on that number, the skirt will not reach when the topper is in place.
Shop by Size at Beddora
Every protector in our collection is listed with exact surface dimensions and maximum mattress depth so you can confirm the fit before you order. Browse the full size range at beddora.ca.
Mattress Protection Mattress Protector Size Guide: Canadian Bed Dimensions Explained
A mattress protector needs to match your mattress size exactly and have a skirt deep enough to stay anchored to your mattress thickness. Canadian bed sizes follow standard dimensions: twin (38 x 75 inches), double (54 x 75 inches), queen (60 x 80 inches), king (76 x 80 inches), and California king (72 x 84 inches). The most common sizing mistake is buying the right size protector with the wrong skirt depth. Measure your mattress thickness before ordering.
Shop our Bamboo Mattress Protector today and enjoy natural breathability, soft comfort, and long-lasting bed protection designed to improve sleep quality while keeping your mattress fresh and clean.
In This Guide
→ Canadian Mattress Sizes at a Glance
→ Why Skirt Depth Matters More Than Size
→ Size Guide by Mattress Type
→ Split King and Non-Standard Sizes
→ Fitted Protector vs Encasement Sizing
→ FAQs
Reading Time: 7 minutes
Ordering a mattress protector the wrong size is one of the most common and easily avoided bedding mistakes. A protector that is too small will not stay anchored through the night. One with a skirt that is too shallow will pop off the corners by morning, leaving sections of the mattress exposed. Getting the size right is a two-step process: match the surface dimensions, then confirm the skirt depth against your actual mattress thickness.
This guide covers every standard Canadian mattress size, the skirt depth ranges you need for each mattress type, and the specific situations where sizing gets more complicated, including pillow-top mattresses, toppers, and split king setups.
Protect your bed with a high-quality Waterproof Mattress Protector that blocks spills, stains, and moisture effectively, helping extend mattress life while ensuring hygienic and worry-free sleep every night.
Canadian Mattress Sizes at a Glance
Why Skirt Depth Matters More Than Size
The surface dimensions of a mattress protector match the mattress size: a queen protector covers a 60 by 80 inch surface. What varies is the depth of the elasticized skirt that wraps around the sides and holds the protector in place. That measurement needs to be equal to or greater than the actual thickness of your mattress.
A standard innerspring mattress typically runs 8 to 12 inches deep. A hybrid mattress with a thick comfort layer often runs 12 to 14 inches. A mattress with a pillow top adds 2 to 4 inches on top of that base depth. If you add a mattress topper, you need to account for that thickness as well, since the protector goes over the topper.
Upgrade your bedding experience with a durable Terry Mattress Protector offering soft surface comfort, absorbent layers, and reliable protection, making it ideal for everyday use and family households.
Most protectors list a maximum depth on the product page. If your mattress is 14 inches deep and the protector skirt only reaches 12 inches, the corners will pull loose during the night and the edges of the mattress will be unprotected. Measure your mattress from the floor-facing surface to the top sleeping surface before you order.
Size Guide by Mattress Type
Standard innerspring (8 to 12 inches)
A protector with a 12-inch skirt fits most standard innerspring mattresses comfortably. If your mattress is on the thinner side, a 10-inch skirt is sufficient. Avoid overshooting significantly on skirt depth for thin mattresses as excess fabric bunches at the corners.
Hybrid mattress (12 to 16 inches)
Hybrids combine coil systems with thick foam comfort layers and typically measure 12 to 16 inches. You need a deep-pocket protector with a skirt of at least 14 inches. Confirm the exact depth of your specific mattress model before ordering.
Memory foam mattress (10 to 14 inches)
Memory foam mattresses sit in a similar depth range to hybrids but without the height variation that coil systems can add. A 12 to 14-inch skirt covers most memory foam options. All-foam mattresses also benefit most from a waterproof protector because liquid that reaches foam cannot be extracted.
Pillow-top mattress (14 to 18 inches)
The pillow top adds a sewn-on comfort layer to the top of the mattress that typically adds 2 to 4 inches to the base depth. A standard queen mattress with a pillow top often measures 15 to 18 inches total. You need a deep-pocket protector with an 18-inch or deeper skirt to stay anchored.
Mattress with a topper (add topper depth to mattress depth)
When you place a topper on your mattress, the protector goes over both. Add the topper thickness to your mattress depth to get the total measurement your skirt needs to accommodate. A 12-inch mattress with a 3-inch topper requires a skirt of at least 15 inches.
Split King and Non-Standard Sizes
A split king is two twin XL mattresses placed side by side. Each measures 38 by 80 inches, and each needs its own twin XL protector. You cannot use a single king protector on a split king setup. The king surface dimensions are 76 by 80 inches, which matches the combined surface of two twin XLs, but a single protector cannot wrap around and anchor to two separate mattresses.
RV mattresses, cot mattresses, and custom mattresses use non-standard dimensions that do not correspond to the sizes above. For these, measure the length, width, and depth precisely and look for a protector listed with those specific dimensions or contact the retailer before ordering. A protector that does not match the surface dimensions cannot provide complete coverage regardless of skirt depth.
Give your baby safe and clean sleep with a certified Premium Crib Mattress Protector designed for comfort, waterproof safety, and easy maintenance, ensuring protection against leaks and allergens.
Fitted Protector vs Encasement Sizing
A fitted protector sizes the same way described above: match the surface dimensions and confirm the skirt depth. An encasement covers all six sides of the mattress and closes with a zipper, so the sizing works differently. The encasement needs to be large enough to slide the mattress into without forcing it, but not so large that the fabric bunches around the sides and creates stress on the zipper.
Most encasements list the mattress dimensions they accommodate and the maximum mattress depth the zipper closure can handle. For a standard queen mattress up to 12 inches deep, a queen encasement sized to those specifications will fit correctly. For a thick hybrid or pillow-top queen, confirm the maximum depth specification on the encasement before ordering.
Get complete 360° protection with a secure Zippered Mattress Encasement that fully seals your mattress from bed bugs, dust mites, and spills while maintaining breathability and long-term durability.
Frequently Asked Questions
What is the difference between a queen and a full mattress protector?
A full protector covers a 54 by 75 inch surface. A queen protector covers a 60 by 80 inch surface. The queen is wider and longer. A full protector placed on a queen mattress will not reach the edges and will pull loose from the corners. Always match the protector size to the mattress size exactly and use the actual name printed on your mattress tag to confirm which size you have.
Can I use a king protector on a California king mattress?
No. A king mattress measures 76 by 80 inches and a California king measures 72 by 84 inches. They have the same total area but different proportions. A king protector is wider and shorter than a California king mattress. It will not fit correctly on either dimension and will not stay anchored. California king is a specific size that requires a California king protector.
My mattress is 15 inches deep. What skirt depth do I need?
You need a protector with a skirt of at least 15 inches, and ideally 16 to 18 inches for comfortable anchoring with some margin. A skirt that exactly matches the mattress depth will stay in place initially but may pull off corners over time as it wears and stretches slightly. Check the product listing for the maximum mattress depth the skirt accommodates, not just the skirt length measurement.
Do I measure my mattress depth with or without the topper?
Measure with the topper in place if you plan to put the protector over both. The protector goes on last, over the topper, so the skirt needs to wrap around the combined depth of the mattress and the topper. If you measure only the mattress and order a protector based on that number, the skirt will not reach when the topper is in place.
Shop by Size at Beddora
Every protector in our collection is listed with exact surface dimensions and maximum mattress depth so you can confirm the fit before you order. Browse the full size range at beddora.ca.