Mattress toppers typically range from 2 to 4 inches in thickness. A thicker topper (3-4 inches) is ideal if you need significant cushioning or want to change the feel of a firmer mattress.

Coolhut 4-Inch Mattress Topper, $90 (was $300) at Walmart. Shop it! The plush mattress topper is four inches thick and features a supportive, pressure-relieving dual-layer design.

Coolhut 4-Inch Mattress Topper, $90 (was $300) at Walmart. Shop it! The plush mattress topper is four inches thick and features a supportive, pressure-relieving dual-layer design.

The 4-inch Lucid Gel Memory Foam Mattress Topper is the tallest of the three height profiles for this topper (the others being 2-inch and 3-inch) but it’s still a budget-friendly option for ...

On the flip side, if your mattress is too firm and you need something softer and more cushioning around your hips and shoulders, consider a soft to medium-soft topper that's thicker (3 to 4 inches ...

Allswell 4-inch Topper Infused with Copper Gel: The Allswell mattress topper has a two-layer design that offers two inches of comfort on top and two inches of support below.

The best cooling mattress toppers provide extra comfort and support and keep you from overheating in bed. After testing, ... The topper is available in 2-, 3-, and 4-inch thicknesses.