Use your bench vise to get the best caster measurements.
I build my shop carts and tool stands the same height as my workbench and stationary tools, and I put them on casters to keep everything mobile. Measuring the true height of casters used to be a head scratcher until I came up with this simple method: all you do is clamp the caster in your bench vise and measure the distance between the jaws. You’ll get the exact height right off the bat.
