hi pal, i just happen to have written down the yardage. i copied from an old apron i had.
the skirt is 20" from waist to hem.
width of fabric was 20" gathered to the size of the waist band.
waist band 4 1/2"x whatever you want the waist band to be.
apron strings, 3 1/2 x 24" you can also just make the waist band and strings one length and only fold in half for the waist band. i think i will do the next one this way.
these dimensions are totally tweekable. the original has a little christmas terry dish cloth sewn into the waist band on one edge so that you have something to wipe your hands on. i chose to put in a pocket instead.
this is a fun apron and very quick. i actually cut all the fabric for both aprons at the same time which really was a time saver.
have fun and don't forget to post pics.