Final answer:
The fee for sizing a matboard does include the cutting of an opening, which is essential in the matting process to enhance and protect the artwork, with custom sizing possibly incurring a higher fee.
Step-by-step explanation:
The fee for sizing a matboard typically includes cutting an opening to fit the size of the artwork that will be displayed. The cutting of this opening is a crucial step in the matting process, which involves placing a border around the artwork to enhance its presentation as well as to protect it by preventing the artwork from coming into direct contact with the glass of a frame.
When you pay for sizing a matboard, you are not just paying for the material itself, but also for the service or the labor involved in measuring and cutting the mat to the correct dimensions, including the precise opening to display your artwork properly.