How do I get the actual size of an object shown to me in their details tab?

In the details tab of, for example, a cube, under scale I can see that I’ve stretched one of it’s axis to 10.75 of it’s original size. Now what I actually would like to know is how many units the, for example, z axis of that object is long now. Now I can switch from realtive to world, but none of the number values under scale change, and the values are definitely still not showing me the actual size in units. Which might be intended, trying to see it there under scale might be thw wrong way, but I’d really like to know how many units something is long or high. It makes keeping things at a correct scale much easier and faster than just going stretchy stretch until my eye says it looks fine.