Hi Joe. Storage can be tough for a lot of shops. To answer your question though, we can easily take 40 bundles of boxes. That is less than what we have on hand Christmas week. We go into that week with about 25 bundles of 16", 10 bundles of 14" and 10 bundles of 12". Being in the mountains where it snows a ton and depending on how busy we need to be prepared to be, I want on hand at least 7-10 days worth of anything that would close me down if I ran out. So… going into Christmas we stock 10 days worth of sauce, cheese, flour, yeast and boxes… rounded up.
Right now, we are slower and we target a 7 day supply. We need one case of cheese, one bag of flour and one bundle of boxes for every $1000 we plan to do in the coming week. Every time we order (2X per week), we fill back up to that level. That way if weather closes the passes between here and denver and we miss a delivery, we will be good on all the core items for 3-4 days beyond when that delivery would have arrived.
For us a year-round normal stock of boxes would be 25 bundles all sizes combined. (Plus whatever we have folded in the kitchen)