Freemason Apron. Macoy has been making Master Mason aprons for decades. These are the finest examples of everyday use Master Mason apron found. They are 13 x 15 inches. Made in Leather. They are beautifully trimmed in your choice of color Medium Blue with Black lining and Red with Black lining. The emblems are printed on the apron. This comes with Skull & Crossbones patch on apron lining.