A mattress topper provides an extra layer of softness and comfort when put on top of a slightly-too-firm mattress. Mattress toppers are sold in a range of materials and thicknesses, so you will certainly be able to find the right level of comfort for your bed. The most popular mattress toppers are made of memory foam or latex, and no matter what kind you prefer, thickness is one attribute to consider when choosing the one that has the right level of comfort for you.
The purpose of a mattress topper is to increase the comfort of your mattress by adding a soft, cushiony layer in between your too-firm mattress and yourself. The thickness of your mattress topper largely depends on how much cushioning you want. A 3-inch mattress topper will be more luxurious and comfortable than a 2-inch topper, so if you are looking for extra comfort, or have a particularly hard mattress, a 3-inch topper is probably right for you. However, 2-inch and 3-inch mattress toppers are both within the range of quality toppers, so the decision between them should be based on personal preference.
A 2-inch mattress topper provides more support than a 3-inch, simply because it cushions less, letting more of the firmness of the mattress through. A 3-inch topper provides more cushioning, so it is possible for the sleeper to sink lower into the topper, losing some of the support provided by the firm mattress. If you have back problems, or require a very supportive mattress, a 2-inch topper is likely better for you than a 3-inch. On the flip side, if you are continually waking up with aching joints, the extra softness of a 3-inch mattress topper will help alleviate this problem.
The weight of the sleeper is one contributing factor when deciding the thickness needed in a mattress topper. A 2-inch mattress topper is likely to provide plenty of cushioning for a smaller person, but a larger person may sink in slightly too deeply to fully benefit from the comfort of their mattress topper. For women over 165 pounds, and men over 185 pounds, a 3-inch topper should be the perfect thickness to provide all the support and softness needed.
Fitted sheets are made to fit mattresses up to a certain depth, and adding a mattress topper on top of your mattress will add to that depth. If your sheets fit snugly on your mattress now, you may consider buying a thinner mattress topper, to avoid having to buy a new set of sheets. The difference between a 2-inch topper and a 3-inch topper could be the difference between squeezing your sheets around the corners of your mattress, or not.
The price of mattress toppers varies widely, from $20 egg-crate foam toppers to natural latex toppers, which cost upwards of $1,000. The thicker the topper, the more expensive, so affordability is something to consider when deciding between a 2-inch or 3-inch topper. However, the material of the topper matters more when determining its price; latex, especially natural latex, and high quality memory foam toppers are among the most expensive because of their ability to provide both support and softness.