Here is a pack of beautiful postage stamp social media icons. 

Two different size: 128px and 64px

This set includes 1 Zip file containing 32 .PNG icons:   

- Dribbble
– Behance
– Facebook
– Flickr
– Google+
– Instagram
– Last.fm
– LinkedIn
– Mail
– Pinterest
– Reddit
– Feeds
– Vimeo
– YouTube
– Tumblr
– Twitter