RV Mattress Topper Size Guide

Measure the mattress, not just the bed name.

RV beds are not all the same size. A Short Queen is shorter than a standard Queen, and “RV King” can refer to different widths and lengths across manufacturers. Bunks can vary even more.

The most useful starting point is the actual sleeping surface in your camper, trailer, motorhome or fifth wheel. Match its width and length to the dimensions of the topper you intend to order.

How to measure an RV mattress for a topper

1. Remove the bedding. Expose the mattress edges so sheets and blankets do not add to the measurement.
2. Measure the width. Run a tape across the sleeping surface from one side to the other.
3. Measure the length. Measure from the head to the foot of the mattress.
4. Check the shape. Note rounded corners, cut corners, tapers or other features that a simple width-by-length measurement does not describe.
5. Check the height. Add the planned topper thickness to the mattress height, then check sheets, protectors and clearances.
6. Compare the exact product dimensions. If the fit or shape is uncertain, confirm it before ordering.

Measure the mattress itself rather than the outside of a wooden frame. A platform, surrounding trim or wall gap can make the bed opening look larger or smaller than the sleeping surface.

Choose 2 inches or 3 inches after checking clearance.

The 2-inch profile adds a lighter cushioning layer. The 3-inch profile adds a deeper layer and raises the sleep surface an extra inch compared with the 2-inch option. Your mattress still supplies the underlying support.

On an RV bunk, check the bed manufacturer’s maximum mattress-height and guardrail requirements before adding any topper. Also check headroom, ladders, nearby windows and access to storage. If your bed folds, lifts or moves with a slide, confirm the manufacturer’s instructions for that arrangement.

For a fuller comfort comparison, read the cooling mattress topper buying guide. For material differences, see gel vs. memory foam toppers.

A final check before you order

• The mattress width and length match the selected option.
• The topper shape fits the actual mattress.
• The mattress underneath is flat and supportive.
• Bedding fits the combined mattress and topper height.
• Required bunk clearances and any moving-bed instructions are satisfied.
• You have reviewed the current price and return terms.

For a conventional bedroom mattress, compare the seven sizes offered on our regular cooling gel mattress topper.