> Can someone give some insight as to the better size before I build them
> with the wrong size screen?
Honey bees can get through.Anything with more holes per inch than 6-mesh
(6 holes per inch). In fact, I used 5-mesh hardware cloth sheets as
queen excluders on 2-queen Farrar hives for years, since 20x20 excluders
were not available.
Some normal bees, but AHB in particular, can get through 6-mesh. Also
consider any wasps or hornets in your region before deciding.
If robbers can easily get through, then the whole hive bottom is open to
robbing. That may not be a big problem for strong hives, but weaker
ones may be robbed out.
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