The pattern calls for the following:
Small and Medium, 5/8 yard of lightweight woven fabric (calico, lightweight denim, or similar), Large 3/4 yard. All sizes call for three 5/8" or 3/4" buttons, a scrap of cardboard 6x3", thread, and 2.5 yards of optional bias tape, ric-rac, or lace trim. The trim would go across the top of the pocket and around the body of the apron.
This pattern is Blessed Designs 2100.