Hi,
found my first leather jacket on the garret, bought in the mid- 70ties.
Unfortunately one size too small now...
Post pics of yours!
Given that I weigh about 70 pounds more than I did when I got my first leather jacket, if I still had it, a classic black one that my grandmother (!) got me when I was 16, it would be way more that 1 size too small. It came from Sears, it was a really heavy duty cowhide. I had it until I was about 25 when it was stolen (with my car and house keys inside) from the restaurant where I was working at the time.
Sadly no pictures of it, but it looked basically like this: