Prometheus wrote:
You can buy levelers as well, but this approach seemed more sturdy.
FWIW, I wouldn't make the legs different sizes. At worst, you're
better off just shimming them.

Level? Forget level, I'm happy with "not rocking".

My bench is shimmed with squares of scrap cardboard. It never moves. I
did actually make some attempt to get it level front-to-back, because I've
got a bunch of drawers on ball-bearing slides, and if it's not level, the
drawers open or close by themselves, which is annoying.

I've got a bunch of things which move around in the shop (bandsaw, drill
press, router table, etc). For that, I've got a bunch of wooden wedges
that live on the floor. When I move something and it's rocking on the
uneven concrete floor, I just find the nearest wedge and kick it under the
short leg. Seems to work well enough.