All sizes of the Dual-Comfort Mattress Topper are the same thickness. The topper is 2 inches thick. On top of the 10-inch thick Endy Mattress, the total depth of the mattress and topper is 12 inches, which fits perfectly with our Organic Cotton Sheets.
We don't recommend the topper with the Endy Hybrid Mattress since it already has plush quilting on the top layer for added comfort while you sleep.