How To Match Your Bedding Size with Mattress Size



aerial view of bed on wooden floor

Getting the right size mattress can be a daunting task for many people. Once you find what suits you best, you then need to consider your linens. Fitted sheets are very strict on sizing, and it’s important to get it right. Knowing the dimensions of your mattress is a central part of this process. There are times when websites may have different sizes for each mattress, so it's always beneficial to double-check their size charts.

Thankfully, Southshore makes it easy to find the perfect sheets by providing the measurements listed on each product page. Referencing those measurements, as well as following these tips and tricks for finding the right-sized linens, will help you make sure your sheets fit seamlessly.

Knowing Your Mattress Size

The first step is to measure the length, width, and depth of your mattress with a tape measure. Make sure to measure from tip to tip in each direction, and don’t forget to take into account any pillow top or additional padding on the bed. Once you’ve got the measurements, it’s time to decide on a size for your bedding.

There are five standard mattress sizes: Twin, Full, Queen, King, and California King. When shopping for fitted sheets, the most common sizes are:

  • Twin / Twin XL 
  • Full
  • Queen
  • King
  • California King 

Standard Mattress Type

Dimensions of Mattress In Inches

Twin Mattress

39 inches x 75 inches

Twin XL Mattress

39 inches x 80 inches

Full Mattress

54 inches x 75 inches

Queen Mattress

60 inches x 80 inches

King Mattress

76 inches x 80 inches

Cal-King Mattress

72 inches x 84 inches

When choosing the right size fitted sheet, it's important that you're precise with your measurements. Other items, such as a flat sheet, duvet cover, comforter, comforter cover, or pillowcases, may be a bit more forgiving with their size.

Southshore Fine Linens provides extra deep pocket sheets that are flexible enough to fit mattresses of all sizes. Each sheet is elasticized and tucked under the mattress for a secure fit.

Looking for the right fit for your bed and for you? Shop now for our high-quality cotton sheets.

Southshore Fine Linens Sizing Chart

Standard Mattress Size

Mattress Dimensions


Bed Sheet Dimensions

Southshore Duvet Match

Southshore Comforter Match

Southshore Sheet Match

Twin Mattress

39” x 75” 

Flat Sheet: 66” x 96”

Fitted Sheet: “39” x 75” x 14”

Pillowcase: 20” x 30”

69” x 98”

69” x 98”

Twin Sheet Set

Twin XL Mattress

39” x 80”

Flat Sheet: 66” x 102”

Fitted Sheet: 39” x 80” x 14”

Pillowcase: 20” x 30”

69” x 98”

69” x 98”

Twin XL Sheet Set

Full Mattress

54” x 75”

Flat Sheet: 80” x 94”

Fitted Sheet: 54” x 75” x 14”

Pillowcase: 20” x30”

69” x 98”

98” x 98”

Full Sheet Set

Queen Mattress

60” x 80”

Flat Sheet: 90” x 102”

Fitted Sheet: 60” x 80” x 30” 

Pillowcase: 20” x 30” 

69” x 98”

98” x 98”

Queen Sheet Set

King Mattress

76” x 80”

Flat Sheet: 108” x 102” 

Fitted Sheet: 78” x 80” x 14”

Pillowcase:  20” x 40”

69” x 98”

108” x 98”

King Sheet Set

Cal-King Mattress

72”x 84”

Flat Sheet: 108” x 102”

Fitted Sheet: 72” x 84” x 14”

Pillowcase: 20” x 30”

69” x 98”

108” x 98”

California King Sheet Set

What About Quilts, Comforters, and Duvets?

There's a bit more flexibility when it comes to quilts, comforters, and comforter covers because they don’t have to fit as tightly as fitted sheets. You can usually go between one or two sizes depending on how much coverage you want or need.

For example, a Twin comforter will fit on either a Twin or Twin XL, and a Queen comforter works well for both a full and queen-sized mattress.

With your duvet cover, it's possible to size up as well. If you have a queen-sized duvet insert, you could purchase an additional king-sized cover. This way, you can switch up the style, size, or pattern with different covers while still keeping the inner duvet in place.

Benefits of Well-Fitted Luxury Bedding

When it comes to luxury bedding, having the right size bedding is essential for a comfortable and stylish sleep experience. A well-fitted mattress not only looks great on your bed but also helps to keep your sheets in place throughout the night. This prevents bunching and wrinkling, giving you a more consistent sleeping surface.

Sheets and Bedding from Southshore Linens

Sheet Sets

Southshore Fine Linens offers bed sheet sets in a range of sizes and colors, making it easy to customize your bedding set. Find the perfect look by selecting from twin, twin XL, full, queen, king, California king, and split king sheet sets — ensuring the right fit for your mattress. Plus, with so many beautiful hues ranging from bright whites to moody blues and warm beiges, you'll find just the right color palette to complement your bedroom decor.

Shop Southshore Fine Linens now for our assortment of luxury bed sheet sets.

Duvet Covers

Transform your bedroom into a luxurious retreat with exceptional, comfortable fabric duvet covers. These elegant duvet designs offer an affordable way to create a lavish focal point without the expensive costs of hotel accommodations.

With a duvet or comforter cover set, you can make your bed as cozy as you'd like it to be. You have the option of choosing any type of comforter, or even removing the inside duvet and using just the cover — making it feel like an extra snuggly blanket.

Our 100% cotton sateen duvet covers are designed with quality and durability in mind, providing long-lasting comfort. Or treat yourself to a luxurious experience with an ultra-soft microfiber duvet cover offering supreme comfort and hypoallergenic protection that's exquisitely smooth to the touch.

These are easy-care high thread count sheets that are machine washable and wrinkle-resistant, so just throw them in the washing machine alongside their sheets.


When it comes to the duvet vs. comforter, some people prefer the comforter because it can be used without an additional cover. Southshore Fine Linens offers comforters with high-quality construction and materials infused with a soft, down-like fill that supplies comfort and warmth while maintaining its shape through the night. They are fade-resistant, easy to wash, and come with a one-year guarantee, making them an ideal choice for any bedroom.

Decorative Pillows

Enhance your bedding decor with a variety of decorative pillows from Southshore Fine Linens. Our selection includes throw pillows and shams in an array of styles, colors, and sizes. Whether you choose to layer your pillows or use them solo, they're the perfect way to add color, texture, and style to your bedroom.

Southshore Fine Linens' luxurious Vilano Springs pillowcases bring you designer style without breaking the bank. With their long-lasting quality, these decorative pillows can be seamlessly mixed and matched with your bed set to give a stunning look.

Invest In High-Quality Sheets With Southshore Fine Linens

Southshore Fine Linens offers luxurious sheet sets and luxury bedding options that are known for their exceptional quality at a fair value. They specialize in high-grade sheets with extra deep pockets, perfect for accommodating today's thicker mattresses. You'll find a wide range of styles and sizes to fit almost any bed. Our extra deep pocket sheets can easily slip onto mattresses up to 22 inches without any issues. With these types of sheets, your bedding set will stay in place no matter what!

The Bottom Line: Matching Your Bedding Size with Mattress Size

energetic young lady stretching upright on mattress

It's important to make sure your sheets, pillowcases, comforters, and duvets fit well. This makes your bed look good, helps to prevent damage to the fabric by holding it taut, and

feels great when you're snuggled in bed. So make sure you find the right size sheets and bedding to fit your mattress with Southshore Fine Linens! With a wide selection of sheet sets, comforters, bed skirts, duvet cover sets, and decorative pillows in all sizes - you're sure to find something that will give you the perfect look for your bedroom. Shop now for luxury linens today!