PNG SVG MORE
Social media
Flat
Intercircles - Social Media Interaction Circles
Stumble upon, stumble
OrangeRed
512x512
PNG ICO ICNS MORE
Freebie: Social Media Icons
stumble, upon
64x64
Leaf
social media, su, Stumbleupon
256x256
PNG MORE
Mixed
Simply 8-bits #11
upon, stumble
96x96
PNG ICO ICNS SVG MORE
Funky - free