Originally Posted by bethzaring
Was/is there a standard pattern?
Yes - the apron is basically square with a triangular flap at the top of the apron which generally will be 1/3 to slightly less than 1/2 the height of the apron.
As Uncle Bob noted - several companies have/do make these. While these are generally pure white lamb skin, some lodges in some states may present an apron trimed in blue when a man is raised to Master Mason. The aprons worn by Lodge officers, or (state) Grand Lodge Officers more especially, can be quite elaborate ...
It sounds like the apron you have is in excellent condition! I wish Grandma had taken that good of care of GG-pa's and G-pa's aprons. I see no problem with scanning it.