Valley Bevelling offers drilling and notching to customer specifications.
Standard hole sizes are 3/16″, 1/4″, 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 3/4″, 7/8″, 1″, 1 3/64″, 1 1/4″, 1 3/8″, 1 1/2″, 1 5/8″, 1 3/4″, 2″, 2 1/8″, 2 1/4″, 2 1/2″, 2 3/14″, 3″, 3 1/4″, 3 1/2″, 4″, and 36MM.
Standard outlet holes in mirror are available in 2″ X 4″ and 4″ X 4″.
Other custom sizes an shapes of holes and notches can be accomplished using a variety of methods.