Gerry Davis' pants originally had a 1" stripe until the standard was set at 1 1/4". Honig's description of both their standard and lightweight pant indicate that
The 1 1/4" white stripe running from waist to cuff conforms to NCAA/NFHS specifications.
. If anybody is going to know and get it right its Dick Honig.
Smitty, RefShop, Cliff Keen, Dalco, Pro Ref,all indicate 1 1/4" stripe in their descriptions.
I think there were some random musings that the NCAA might come up with a 2" stripe pant to match the 2" stripe shirts and HS would keep the 1 1/4" striped shirts & pants as some sort of differing of the uniform by level. Maybe you saw a "concept pant"?