Here is a front and back view of a Victorian ladies’ plaid apron with black edging. It has two plaid pockets with black edging in front. The apron buttons up behind the neck, behind the waist by a narrow waist band that is attached to the apron, and also at the top of the skirt in back. The illustration shows the apron over a plain, long-sleeved collarless shirt.
Here is a black and white clip art version of the illustration.
I scanned the original image from the November 1891 issue of The Delineator magazine.