What a difference a cushion makes!  I am using this on a glider on my front porch.  It replaces a fairly comfortable but flat seat cushion.  Although I read the measurements correctly, they didn't translate correctly into real-life.  It adds enough height to the glider seat that I have to stretch to reach the ground.  OK, I'm only 5'2", but still . . .It's also a little short for my glider seat, but again, that's because I didn't take the time to figure out how the measurements would affect the usage in my situation.

Just make sure your bench seat matches the measurements of the cushion, and, before purchasing, try adding a pillow the same height as the seat cushion to see where YOUR feet land!