I simply cut up the tablecloth following a simple pattern, which you could make yourself and don't forget to cut the pockets to catch all that food.... best invention ever! Not mine, but I do love it.
With wrong sides together take the 2 pocket pieces and sew binding along the straight pieces.
These are the pieces you should have, minus the cotton backing... not included in this picture.
With the pocket pieces in the middle of the vinyl and solid cotton piece, sew together leaving and opening at the bottom to turn right side out.
Turn right sides out and sew all the way around the bib, makes a nice finish. The last step is to sew a piece of Velcro on to keep the bib on!