Allswell mattresses are slightly shorter than the average mattress, but the difference is negligible.
Generally, most mattresses come in standard sizes, as shown below:

Now let’s take a closer look at the dimensions of Allswell mattresses.
- Twin: 38.5” x 74.5″
- Twin XL: 38.5” x 79.5″
- Full: 54″ x 74.5″
- Queen: 60″ x 79.5″
- King: 75.5” x 79.5″
- Cal. King: 72″ x 84″
For example, a queen-sized Allswell mattress is 0.5″ shorter than the average. A twin-sized Allswell mattress, on the other hand, is 0.5″ wider and 0.5″ shorter than other twin-sized mattresses.