You can ask Jayco for the window width - they usually get back to you very quickly (at least on weekdays). Use this link
to put in a customer service inquiry (you'll need your rv serial number (last 8 digits of the vin)).
Enrico and Donna + 2 kids
RAM 2500 + Jayco Jay Flight 25BHS
Black tank Quick-e Flush, MaxxAir Vent cover, TV bracket and LCD TV, added Slideout awning, bunk ladder, added socket and reading light to top bunk, added bathroom fan switch near light switch, insulated all externally accessible storage, sealed pass through storage from interior of trailer, LED lights throughout, added LED lights to storage compartments