What kind of lens to photograph a 1 mm object?

I want to photograph an one mm (or slightly less) object. I have a Canon EOS 80D. What lens should I use, or is there any other way to accomplish this?

What kind of lens to photograph a 1 mm object?

I want to photograph an one mm (or slightly less) object. I have a Canon EOS 80D. What lens should I use, or is there any other way to accomplish this?