Finding sheets for an 18-inch mattress is mostly a matter of checking the fitted sheet’s pocket depth—not just the set’s “deep pocket” label. If you use a topper or mattress pad, measure the full height of your bed with those layers in place. The picks below include sets designed for mattresses from 18 to 24 inches deep, plus one option rated for mattresses up to 18 inches.
Quick Comparison
| Sheet set | Material | Stated mattress fit | Set details |
|---|---|---|---|
| Hearth & Harbor Extra Deep Pocket Sheets | Double-brushed microfiber | 18–24 inches | Queen set; 4 pillowcases |
| CGK Unlimited Extra Deep King Sheet Set | Double-brushed microfiber | 18–24 inches | King set; 2 oversized pillowcases |
| Shilucheng Egyptian Cotton Sheets | Egyptian cotton, as described in listing | 18–24 inches, though listed fitted-sheet depth is unclear | Queen title; set details need checking |
| SONORO KATE Bamboo-Derived Sheets | Viscose derived from bamboo | 18–24 inches | Queen set; 2 pillowcases |
| Bedsure Deep Pocket Queen Sheets | Fabric type not specified in supplied details | 16–18 inches | Queen set; reinforced corners and straps |
Our Picks: Best Sheets For 18 Deep Mattress reviews
1. Hearth & Harbor: A Queen Set With Extra Pillowcases
This queen-size microfiber set is designed for mattresses from 18 to 24 inches deep, making it a strong match for an 18-inch bed and many taller setups. The fitted sheet measures 60 by 80 inches, and the set includes a flat sheet and four pillowcases—more pillowcases than most of the other sets here.
The fabric is double brushed on both sides, according to the product details. It is also described as resistant to pilling, snagging, fading, stains, shrinking, and wrinkles. Those features may appeal to busy households or pet owners, though fabric care and normal wear can affect how sheets look over time.
Compared with the cotton and bamboo-derived options below, this set is a straightforward microfiber choice with a generous stated depth range. Check your mattress width and length as well as its height, and note that the listing’s fit range does not guarantee the same feel or tension on every bed.
Pros:
- Designed to fit mattresses 18–24 inches deep
- Queen set includes four pillowcases
- Double-brushed microfiber is described as soft
- Machine washable, with cold-water washing and low-temperature tumble drying recommended
Cons:
- Microfiber may not suit shoppers who prefer natural-fiber sheets
- Care directions call for low-temperature drying to help maintain the fabric
Verdict: Choose this set if you want a queen-size microfiber option with an 18–24-inch fit range and extra pillowcases.
2. CGK Unlimited: Extra-Deep King Sheets With Oversized Pillowcases
This four-piece set is made for king mattresses 18–24 inches tall. Its fitted sheet measures 78 by 80 inches and has 21-inch pockets with stretchable all-around elastic. The set also includes a 111-by-102-inch flat sheet and two oversized pillowcases measuring 20 by 40 inches.
The listing positions this set for tall beds with toppers, pillow tops, pads, or added foam layers. It also describes the fitted sheet as suitable for adjustable bases, where a snug fit can help keep bedding neater as the bed moves. Double-brushed microfiber gives it a smooth, lightweight feel, and the fabric is described as wrinkle resistant.
One detail to keep in mind: the product information gives a general fit range of 18–24 inches but lists 21-inch pockets for the fitted sheet. If your mattress and bedding layers measure much taller than 21 inches, confirm the fit details before ordering. This is a king set, so it is not the right size for a queen bed.
Pros:
- Made for king mattresses in the 18–24-inch range
- Stretchable elastic is intended to help limit corner lift and bunching
- Listing says it works with toppers and adjustable bases
- Includes oversized king pillowcases
Cons:
- King size only, based on the supplied product information
- Listed 21-inch pocket detail is worth checking for beds near the top of the stated range
Verdict: This is a practical choice for a king bed with an 18-inch mattress, especially if you use a topper or adjustable base.
3. Shilucheng: Cotton Sheets With Conflicting Size Details
This set is presented as 100% Egyptian cotton and is described as suitable for mattresses 18–24 inches deep. The listing also says the cotton is intended for year-round use and identifies the sheets as OEKO-TEX Standard 100 certified. The supplied care guidance recommends a gentle cold-water wash and low-temperature tumble drying.
There is an important sizing issue to resolve before buying. The title identifies the set as Queen, and the listed fitted-sheet measurements are 60 by 80 inches, which match a queen mattress. However, other details refer to a king set, and the fitted sheet is described as 20 inches deep even though the listing claims an 18–24-inch fit range. Those details do not clearly confirm how the sheet fits a mattress taller than 20 inches.
The fabric may interest shoppers who want cotton rather than microfiber or bamboo-derived viscose. Still, the mixed size and pocket-depth information makes this a less certain pick than the other sets. Check the current listing’s selected size and fitted-sheet dimensions before placing an order.
Pros:
- Listed as 100% Egyptian cotton
- Advertised for extra-deep mattresses from 18–24 inches
- Product details state OEKO-TEX Standard 100 certification
- Machine washable, with low-temperature drying recommended
Cons:
- Product details conflict on whether the set is Queen or King
- Stated 20-inch fitted-sheet depth does not clearly support the full 24-inch fit claim
Verdict: Consider this set if you prefer cotton, but verify the size and pocket depth in the listing before choosing it for a tall mattress.
4. SONORO KATE: Bamboo-Derived Viscose for a Smooth Feel
This queen-size set is made from viscose derived from bamboo and is designed for mattresses 18–24 inches deep. The fitted sheet is listed at 60 by 80 inches, with a 360-degree elastic band intended to help it grip the mattress. The four-piece set also includes a flat sheet and two pillowcases.
The product details emphasize a silky-smooth feel and moisture-wicking, cooling comfort. Those are useful qualities to consider if you tend to sleep warm, but how cool a sheet feels can also depend on your room, bedding layers, and personal comfort. The set is described as machine washable and dryer friendly, with cold washing and low-temperature drying recommended.
Unlike the microfiber options, this one uses bamboo-derived viscose. It may suit you if that material and a smooth hand feel are priorities. Make sure the stated pocket range matches the full height of your mattress with any topper or pad in place.
Pros:
- Designed for mattresses 18–24 inches deep
- Queen set includes a flat sheet and two pillowcases
- 360-degree elastic is intended to provide a closer grip
- Listing highlights moisture-wicking and cooling properties
Cons:
- Not a cotton or microfiber set
- Low-temperature drying is recommended as part of its care
Verdict: Pick this set if you want queen-size sheets made from bamboo-derived viscose and need a stated fit range that covers an 18-inch mattress.
5. Bedsure: Reinforced Queen Sheets for an 18-Inch Mattress
Bedsure’s queen set is designed for mattresses 16–18 inches deep, so an 18-inch mattress is at the top of its stated range. The fitted sheet measures 60 by 80 inches and uses reinforced corners with a wide, multi-layer elastic band. The product details say this construction is intended to help prevent slipping, shifting, and popped corners.
This set includes a flat sheet and two pillowcases. Its fabric type is not specified in the supplied product details, so shoppers who have a strong preference for cotton, microfiber, or another material should confirm that information before buying. The listing describes the fabric as wear resistant and pet friendly and says it is machine washable.
Unlike the first four options, this set is not advertised for mattresses deeper than 18 inches. It may suit you if your mattress measures exactly 18 inches and keeping the corners secure is a priority. If a topper or pad takes the overall height above 18 inches, choose a set with a deeper stated range instead.
Pros:
- Queen size fits mattresses up to 18 inches deep
- Reinforced corners and a wide elastic band are designed to help hold the sheet in place
- Includes a flat sheet and two pillowcases
- Listing identifies the material as OEKO-TEX Standard 100 certified
Cons:
- Not intended for mattresses deeper than 18 inches
- Fabric type is not specified in the supplied product details
Verdict: Choose Bedsure for a queen mattress that measures 18 inches or less when corner security matters more than extra pocket-depth range.
How to Choose Sheets for an 18-Inch Mattress
Measure the Full Bed Height
Measure from the mattress base to the top surface of the mattress. If you use a topper, mattress pad, or other layer beneath the sheet, measure over those layers too. An 18-inch mattress can become a taller setup once bedding layers are added, so the mattress label alone may not tell you which pocket depth you need.
Check the Fitted Sheet’s Pocket Range
Look for a stated depth range that includes your bed’s full measured height. A set advertised for 18–24-inch mattresses offers more room for variation than one rated only up to 18 inches. Also check any separate fitted-sheet measurements: some listings give a general range and a specific pocket depth that may not be identical.
Match the Sheet Size to Your Mattress
Confirm that the set is the right size—such as Queen or King—and compare fitted-sheet width and length with your mattress. A deep pocket will not make a sheet fit the wrong mattress size. Pay special attention to listings whose product title and size details do not agree.
Consider Your Mattress Setup
Topper users, pillow-top owners, and people with adjustable bases may want a fitted sheet with elastic around the full edge and a pocket depth that covers the complete setup. If your bed moves, a secure fit can help the sheet stay neater, but no sheet design guarantees it will remain perfectly in place on every mattress.
Choose a Fabric That Suits Your Preferences
Microfiber, cotton, and bamboo-derived viscose have different feels and care needs. The microfiber sets here are described as brushed and soft, while the cotton set may appeal to shoppers looking for a natural fiber. The bamboo-derived viscose set is described as smooth and moisture-wicking. Consider the listing’s fabric information and washing directions before deciding.
Look at What Comes in the Set
Sets can vary in the number and size of pillowcases. For example, the Hearth & Harbor queen set includes four pillowcases, while several other options include two. Check the flat-sheet and pillowcase measurements as well, especially if you use oversized pillows or want spare pillowcases.
Frequently Asked Questions
Will sheets labeled 18–24 inches fit an 18-inch mattress?
They are designed to cover that depth range, but fit also depends on mattress dimensions, elastic construction, and any topper or pad. Measure the full height of your bed and compare it with the fitted-sheet details.
Are deep-pocket sheets the same as extra-deep sheets?
Not always. These terms are used inconsistently across listings, so check the actual depth range or fitted-sheet pocket measurement rather than relying on the label alone.
Should I measure my mattress with a topper on it?
Yes. If you plan to keep the topper under the sheet, measure from the mattress base to the top of the topper. Choose a fitted sheet that covers that combined height.
Which option is made for a king mattress?
The CGK Unlimited set is identified as a king-size set in the supplied product details. Check the selected size and measurements on the product page before ordering.
Can I use the Bedsure set on a mattress taller than 18 inches?
The supplied details state that it fits mattresses from 16 to 18 inches deep. For a setup taller than 18 inches, consider one of the sets listed for an 18–24-inch range instead.
Which set includes the most pillowcases?
The Hearth & Harbor queen set includes four pillowcases. The other sets described here include two, though you should confirm the selected size and included pieces on the product page.
Final Recommendation
For a queen mattress that measures 18 inches deep, Hearth & Harbor is a straightforward option with an 18–24-inch fit range and four pillowcases. If you prefer bamboo-derived viscose, consider SONORO KATE; for a king bed, look at CGK Unlimited. Bedsure is a closer fit for an 18-inch bed that needs reinforced corners, but it is not rated for anything deeper. Shilucheng may suit cotton shoppers, but its conflicting size and pocket-depth details make verification especially important.