Is that the size of your summertime entrance or has the entrance been reduced for the winter? That times two, one on either side of the hive?

https://steemitimages.com/640x0/https://ipfs.busy.org/ipfs/QmP6Uo9eZdVBFT4PzJUe3R2Sq21PNAWv8bpiqKVr67jofK

I have a problem with mice and I would like to make the fix permanent, just build it into the hive. That would work. I'm pretty sure one of our mice wont fit through that entrance.