I think a cookie jar the size my grandmother had would be too large for a bead box or a bead box wouldn’t be large enough for a cookie jar.
I'll measure, but I make Beads of Coiurage boxes pretty large, big enough for cookies at our house. (We keep most home-baked cookies in the freezer and get out some as we need or to give them to others.) The BOC people suggest making turned boxes 6" diam x 5" tall but then say bigger is better. Some cancer-patient kids get a LOT of beads - one for each needle stick, one for losing hair from radiation treatments, for every procedure - they put them on long strings to get out to tell their stories. Sad thing is I was told of parents who used the box for the funeral ashes.
I make them larger than specified but I can measure the one I have left. I think most were at least 7" dia x 7" tall, not counting the lid knob.
Here are some turned in at our club. Mine is the second one with "Beads of Courage" chip carved in the basswood layer.
That size might not be good for jumbo cookies.
I posted this pic before - here's one of the same basic design I made for a special little boy. These benefit from a stable base.
I made this one from an end-grain blank of y. poplar. Don't remember the size but I could estimate it based on the music box in the lid.
For those who want to make BOC boxes I have quite strong thoughts about the lids and share them in demos and to anyone who will listen. I should post these thoughts and explain why in another thread. It "turns" out there are some bad ways to make the lids.
It was satisfying to watch a guy I know doing a demo on making BOC boxes - he recommended the same method! This was at some point after I made my case and started teaching about the lids.
JKJ