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Social media
Glyph
Social Network
plus icon, G+, +
OrangeRed
512x512
G+, +, plus icon
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Flat
Popular Social Services
Flat-icons, google, google-plus
110x110
Popular Services
plus, google
Iconza Circle Social
+, google, G+
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Smooth
Yama1 Social
Social, yama, Google+
128x128
Social media icons – The Circle Set
Circle, google
Balvardi Social Network Iconset
Balvardi, google, blogger
Funky - free
google