i dont own one, or this im about to show, but thought about getting one for a friend for his birthday.

this is the slim, there is a large one too..
from
Walnut Studio, a little leather etsy shop with a bunch of other bike stuff. bike snob made fun of their frame shoulder leather pad thingy in correlation with the faux-lumberjack hipster movement. he had a name for it i cant remember lol ... edit: nevermind, "dandycross" lol, they say it on their page and even have a link..

i actually sort of dig it....it would have actually come in handy when i lived in san francisco and was biking and taking bart (bay area transit) all over. lots of hiking your bike on your shoulder up lots of stairs from getting off the underground train.
but i really dig some of their stuff. and the leather is all "upcycled'