Of White Lambskin sixteen inches wide & fourteen inches deep, rectangular in shape with a semi-circular flap six inches deep at the centre.  
 
An edging of two-inch wide Thistle Green material (ribbon) with an internal border of half-inch Gold Lace; the flap trimmed in Thistle Green material (ribbon) with half-inch wide Gold Lace above a Gold Bullion Fringe.  
 
Embroidered in Gold on the flap the Emblem of Office with Thistle Embroidery both sides of the Emblem.  
 
Tassels of seven chains suspended from Green Ribbons from underneath the flap on each side.  
 
Two Rosettes of Green material (ribbon) on lower corners of the Apron.  
 
A padded 3" diameter Badge of The Grand Lodge of Scotland (St. Andrew) in on the centre of the Apron Lambskin.