Deep Pocket and Fitted Sheets
Best Extra Deep Pocket Sheets for 18 Inch Mattress
7 picks compared
6 min read
ProductPickly is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no extra cost to you. It never changes our picks.
The short answerFor an 18-inch mattress, top picks include the Mellanni Extra Deep Pocket Sheet Set, the Bedsure Deep Pocket Sheets, and the CGK Unlimited Deep Pocket Sheets. Each offers a secure fit and quality fabric.
?How we pickedWe compare published specifications, safety certifications and thousands of verified owner reviews, and we do not physically test every unit. Read the full process in our review methodology.
Mellanni Extra Deep Pocket Sheet Set
★★★★★ 4.6 / 5 Best Overall
Mellanni's extra deep pocket sheets fit mattresses up to 24 inches. The brushed microfiber fabric is soft and breathable. Owners report the elastic band keeps the sheet in place all night.
Pocket Depth Up to 24 inchesMaterial MicrofiberThread Count Not specifiedAvailable Sizes Twin to California King
- Deep pockets
- Soft, wrinkle-resistant fabric
- Stays put
- May be too warm for hot sleepers
Bedsure Deep Pocket Sheets
★★★★★ 4.5 / 5 Best Value
Bedsure offers deep pockets that fit up to 21 inches. The microfiber material is durable and easy to care for. Many owners appreciate the affordable price for a full set.
Pocket Depth Up to 21 inchesMaterial MicrofiberThread Count Not specifiedAvailable Sizes Twin to King
- Affordable
- Good fit for most deep mattresses
- Easy to wash
- Thinner than premium options
CGK Unlimited Deep Pocket Sheets
★★★★★ 4.4 / 5 Best for Extra-Thick Mattresses
CGK Unlimited sheets are designed for mattresses up to 24 inches thick. The fitted sheet has an elastic band that goes all around the bottom. Owners with pillow-top mattresses report a secure fit.
Pocket Depth Up to 24 inchesMaterial MicrofiberThread Count Not specifiedAvailable Sizes Twin to California King
- Extra deep pocket
- Full elastic band
- Soft and comfortable
- Some find the fabric slippery
Best for: Best for Extra-Thick Mattresses
Utopia Bedding Deep Pocket Sheets
★★★★★ 4.3 / 5 Best Budget
Utopia Bedding offers a budget-friendly option with a pocket depth of 18 inches. The microfiber fabric is lightweight and easy to maintain. It fits most 18-inch mattresses, but not thicker ones.
Pocket Depth 18 inchesMaterial MicrofiberThread Count Not specifiedAvailable Sizes Twin to King
- Very affordable
- Soft
- Good for standard 18-inch mattresses
- May not fit thicker mattresses
- Thin fabric
Amazon Basics Extra Deep Pocket Sheets
★★★★★ 4.4 / 5 Best for Hot Sleepers
Amazon Basics sheets feature a microfiber weave that promotes airflow. The pocket depth reaches 22 inches, fitting most deep mattresses. Owners mention the sheets feel cool to the touch.
Pocket Depth Up to 22 inchesMaterial MicrofiberThread Count Not specifiedAvailable Sizes Twin to King
- Breathable
- Good fit
- Affordable
- Some report pilling after washes
Best for: Best for Hot Sleepers
Southshore Fine Bedding Deep Pocket Sheets
★★★★★ 4.3 / 5 Best for Allergies
Southshore Fine Bedding sheets are hypoallergenic and resist dust mites. The microfiber fabric is tightly woven to block allergens. They fit mattresses up to 22 inches deep.
Pocket Depth Up to 22 inchesMaterial MicrofiberThread Count Not specifiedAvailable Sizes Twin to California King
- Hypoallergenic
- Soft
- Deep pockets
Best for: Best for Allergies
LuxClub Deep Pocket Sheets
★★★★★ 4.6 / 5 Best Luxury Feel
LuxClub sheets have a brushed microfiber finish that feels like high-end hotel bedding. The pocket depth is 22 inches, suitable for most deep mattresses. Owners praise the durability and softness.
Pocket Depth Up to 22 inchesMaterial MicrofiberThread Count Not specifiedAvailable Sizes Twin to California King
- Luxurious feel
- Durable
- Deep pockets
Best for: Best Luxury Feel
Our criteria included pocket depth, fabric quality, and ease of care. We also considered how each set performs for different sleepers and budgets.
What to Look For in Extra Deep Pocket Sheets
Check the pocket depth specification. For an 18-inch mattress, look for a pocket depth of at least 18 inches, but ideally 20 to 24 inches for a secure fit. Consider the elastic quality; a full elastic band or deep pockets with strong elastic prevent slipping. Also, examine the fabric type and weave for breathability and comfort.
Fabric and Weave Considerations
Microfiber is common and affordable, but it can trap heat. Cotton percale is breathable and crisp, while cotton sateen is soft and silky. For hot sleepers, look for moisture-wicking or cooling properties. The thread count matters for cotton, but for microfiber, the quality of the weave is more important.
How to Measure Your Mattress Depth
Use a tape measure to measure from the top surface of the mattress to the bottom edge of the box spring or foundation. Add an inch or two to account for mattress toppers. This measurement will help you choose the right pocket depth. If you're unsure, opt for a deeper pocket to ensure a good fit.
Caring for Your Deep Pocket Sheets
Always follow the care instructions on the label. Most microfiber sheets can be machine washed in cold water and dried on low heat. Avoid using bleach or fabric softeners, as they can break down the fibers. Remove sheets promptly from the dryer to reduce wrinkles.
Questions people ask
What is the best extra deep pocket sheet for an 18 inch mattress?
The Mellanni Extra Deep Pocket Sheet Set is a top choice. It fits up to 24 inches and has a soft, secure fit.
How deep should pockets be for an 18 inch mattress?
Pockets should be at least 18 inches deep, but 20 to 24 inches is safer for a secure fit.
Can I use regular deep pocket sheets on an 18 inch mattress?
Regular deep pockets are usually 15 to 16 inches, which may not fit. Extra deep pockets are recommended.
What is the difference between deep and extra deep pockets?
Deep pockets typically fit 15 to 16 inches. Extra deep pockets fit 18 to 24 inches.
Are extra deep pocket sheets more expensive?
Not necessarily. Many budget-friendly options exist, like Utopia Bedding, but premium brands may cost more.
Which sheets are best for hot sleepers?
Look for breathable fabrics like cotton or microfiber with cooling technology. Amazon Basics and Mellanni are good choices.
Do extra deep pocket sheets fit mattress toppers?
Yes, if the pocket depth accommodates the topper. Measure the total height after adding the topper.
How do I keep deep pocket sheets from slipping?
Choose sheets with a full elastic band or deep pockets. Some owners use sheet straps for extra security.
What is the best budget extra deep pocket sheet?
Utopia Bedding offers a good budget option, but it fits only up to 18 inches exactly.
Are microfiber sheets good for deep mattresses?
Yes, microfiber is stretchy and durable, making it a popular choice for deep pockets.
The bottom lineSo which one?
For most people, the Mellanni Extra Deep Pocket Sheet Set offers the best combination of fit, comfort, and value. If you need a budget option, Utopia Bedding works for standard 18-inch mattresses. Always measure your mattress and consider your sleeping temperature preferences.
