Is 1/2 inch wire mesh suitable for mouse guards , it looks a little big to me , I am thinking that small mice can set thru.

So far I haven't been able to find any 3/8 mesh locally , just 1/2 or 1/4(too small).

Or maybe I should drill some 3/8 or 5/16 holes in the entrance reducer?

What do you use?

Any input would be appreciated.