I made this apron like my grandmother did: 35-40 inches wide and 20 inches long; 30 inch ties and 18-20 inch waistband. (Ok, her ties were shorter but I like to wrap and tie in front.) Since these were remnants I made some adjustments. The center panel is french seamed to keep raw edges from showing. And there was just enough to make one pocket.
Fret not; enjoy the day.