Available Avatar Sizes
More sizes are available via the API.
example: http://api.proofile.org/userid/203/avatar/size/77.png
User: rmarkwhite
256x256: http://www.proofile.org/userdata/e2/203/avatar/avatar_172_256.png
200x200: http://www.proofile.org/userdata/e2/203/avatar/avatar_172_200.png
128x128: http://www.proofile.org/userdata/e2/203/avatar/avatar_172_128.png
100x100: http://www.proofile.org/userdata/e2/203/avatar/avatar_172_100.png
80x80: http://www.proofile.org/userdata/e2/203/avatar/avatar_172_80.png
64x64: http://www.proofile.org/userdata/e2/203/avatar/avatar_172_64.png
60x60: http://www.proofile.org/userdata/e2/203/avatar/avatar_172_60.png
50x50: http://www.proofile.org/userdata/e2/203/avatar/avatar_172_50.png
32x32: http://www.proofile.org/userdata/e2/203/avatar/avatar_172_32.png
24x24: http://www.proofile.org/userdata/e2/203/avatar/avatar_172_24.png
16x16: http://www.proofile.org/userdata/e2/203/avatar/avatar_172_16.png
