Bedding Dimensions Made Simple: Find the Perfect Fit for Your Bed

Ever bought sheets that felt too tight or a comforter that kept sliding off? It usually comes down to the basics – knowing your bedding dimensions. In this guide we walk through the most common mattress sizes, how to measure your bed, and what to look for when shopping for sheets, blankets, and fitted covers.

Know Your Mattress Size First

Before you click “add to cart,” check the exact size of your mattress. In the UK the standard names are Twin (90 × 190 cm), Double (135 × 190 cm), King (150 × 200 cm), and Super King (180 × 200 cm). Some brands also offer “Small Double” (120 × 190 cm) and “European King” (160 × 200 cm). Write down the length and width; the depth is the third number you’ll need for fitted sheets.

Measuring the depth is easy – pull the top edge of the mattress up with a ruler or tape measure. Most modern mattresses sit between 20 cm and 30 cm deep, but pillow‑top models can push past 35 cm. When you know the depth, you can pick a fitted sheet with the right pocket size. A good rule of thumb is to add 5 cm to the measured depth for a snug but not restrictive fit.

Sheet Sizing – What to Look For

Sheet packages usually list the mattress dimensions they fit, but they may also note the pocket depth. If you have a 20 cm deep mattress, a sheet labeled “20 cm pocket” will be fine. For deeper mattresses, choose a sheet with a 25 cm or 30 cm pocket. Don’t forget the length and width – a Double mattress needs a sheet marked 135 × 190 cm or larger.

Flat sheets are less picky because they lie on top of the mattress. Still, a sheet that’s too small will look uneven, and one that’s too big can bunch up. Aim for a flat sheet that’s at least 30 cm longer than your mattress on each side. That extra fabric lets you tuck it neatly under the mattress for a tidy look.

Blankets, Duvets, and Comforters

Blankets and duvets follow the same size logic as sheets, but they often come in “standard” sizes that match common mattress dimensions. A duvet labeled for a Double bed will usually be about 200 × 200 cm, giving enough overhang to keep you warm. If you love a cozy, layered look, you can size up – a King duvet on a Double bed adds extra coverage without looking bulky.

Check the fill weight if you’re buying a duvet. A 10 tog (thermal rating) duvet works well for summer, while a 13‑15 tog is better for chilly nights. The tog rating doesn’t change the dimensions, so you can mix and match based on comfort.

Quick Checklist Before You Buy

• Measure mattress length, width, and depth.
• Match sheet pocket depth to mattress depth (+5 cm for ease).
• Choose flat sheets at least 60 cm wider and longer than the mattress.
• Pick blankets or duvets that match or slightly exceed mattress size.
• Consider tog rating for seasonal comfort.

Following this checklist saves you time, money, and the frustration of ill‑fitting bedding. Keep the measurements handy, especially if you move or upgrade your mattress. With the right dimensions, your bed will look neat, feel comfortable, and stay tidy for years.

Got a weird mattress size or a custom bed? No problem – just add a few centimeters to the standard dimensions and look for “extra deep” or “oversized” options. Most retailers list the exact numbers, so you can compare side by side before you hit checkout.

Now that you know the basics, go ahead and pick the perfect sheets, blankets, and duvet for your bedroom. Your sleep will thank you!