This is my second round of smock bibs. I made six this time- five with snaps to close (bottom photo), and one with a tie (top photo).
I used the same shirt bib pattern as before, with the same modification of making the arms wider.
I made these assembly-line style, which worked quite nicely. My favorite assembly line trick is to feed one item in right after the other, then cut them apart after. I did that with these and the FOE (fold over elastic).
I used PUL for the bibs, and FOE for the binding, though you could use anything for the binding. I used KAM snaps at the neck.