I try to rehome larger, good quality boxes.
Sometimes I list them on Facebook Marketplace.
If no one responds, we flatten them and I take them to a recycling center. (There are too many to go in our pick up bin.)
But most of the time, someone comes to get them immediately.
I also have a local lady with a shop, who also has an Etsy shop. I save two types of boxes for her. We get a medicine shipment once a month in a sturdy box lined with styrofoam. I get a once a week shipment of meals from GreenChef in an insulated box.

