Top horizontal section along the curve: 11 & 1/8″
Top horizontal section height (top to bottom): 1 & 3/8″(ends) to 1 & 5/8″ (toward middle)
Middle vertical section from top to bottom: 6 & 1/2″
Middle vertical section width (left to right): 2 & 5/16″
REMEMBER: T-Visors are installed from the inside of the helmet so a little bit of overlap is a good thing.
Fits Don Post®, Rubies® Helmets as well as others.