7/16ths is scaled to 2 1/4" (standard) gauge ...1/2" scale is 2 1/2" gauge ....
Lobaugh,offered scaled car kits for the gauge,
7/16th scale was a real thing for a very short time ...Graham and Shaw made trolleys in 7/16ths ....Shaw also made passenger cars in 7/16ths ....they are about,32" long ..both were in the 1933-6 window ...