Trimming Outer Edge Of Box OR Object

I’ve scoured online resources and haven’t found a really simple way to trim the outer edge of a 3d object/box by a set amount, say 1/16th of an inch.

Is this an extrude command, or a trim thing?

Offset the outer curve and use wirecut.

I’ve tried all the various offset options and wire cut and can’t seem to make this work. What are some of the steps?

The object you want to wirecut needs to be a closed polysurface. If it is not, you can use Trim in Top view, with the apparent intersection option ticked. You will have to mend the gap in some way, with Loft or ExtrudeSrf for instance. WireCut will do that for you.