Top horizontal section along the curve: 11 & 3/8″
Top horizontal section height (top to bottom): 1 & 1/4″(ends) to 1 & 5/8″ (toward middle)
Middle vertical section from top to bottom: 4 & 3/8″
Middle vertical section width (left to right): 1 & 1/2″ (bottom) 2″ (were it meets horizontal section)
REMEMBER: T-Visors are installed from the inside of the helmet so a little bit of overlap is a good thing.
Fits Republic Commando helmets as well as others.