Vintage VTG 70s/Early 80s Leather Blazer/Suit Jacket

Wore this once on stage for something and haven't worn it since. I love it, it's just too small for me and doesn't feel comfortable for more than a few minutes. The jacket is in beautiful shape, could use some leather oil/a rundown for a softer look/better drape but as it doesn't fit me, I'm not doing that. Measurements in photos.