I had read a story some years ago about the width of the pin stripes. It said that the stripers used old felt hats to do the job. So, it depended on the width of the felt as to how wide the stripes were.
I used stripping tape on my 63 G80 Major. Yes, I know it is a sin to purists. It is 1/4" for the wide stripe, a 1/8" gap and a 1/8" for the narrow stripe.