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