For your consideration, here is an Old Store White Capital Letter I Plastic Sign, Architectural Salvage.  It measures 5 5/8 inches tall, 1 3/4 inches wide and 3/8's of an inch deep.  It has some wear.  There are water spots that do not seem to want to come off.  It has mounting holes on the back of it.  

It will be mailed in a box for protection.  Item pictured is the actual item up for sale and come from a non-smoking household.  (343.886h-.5z3)