On a whimsy I decided to make shelves for my finder like the iPhone dock.
There was maybe a short interest in such things some years back, but since then most of the links for Finder shelves pngs are broken. I wanted something nice and also small, so I adapted some ones for my use from bits and pieces online.
128 x 128 icons
All the ones available online are 128x128. This is what is looks like. You can download the original shelves from these links:
Converting it for 64 x 64 icons
Personally I find 128 x 128 too big. The rest of the 64 x 64 versions on the internet dont work - all the links are broken, or they simply will not fix properly to my Finder. So I adapted my own 64 x 64 version from these.
Grid setting can be wider even if you please. But it cannot be smaller.