Flickr Sizes
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<size label="Square" width="75" height="75" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_s.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/sq/" media="photo" />
<size label="Large Square" width="150" height="150" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_q.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/q/" media="photo" />
<size label="Thumbnail" width="100" height="75" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_t.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/t/" media="photo" />
<size label="Small" width="240" height="180" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_m.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/s/" media="photo" />
<size label="Small 320" width="320" height="240" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_n.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/n/" media="photo" />
<size label="Medium" width="500" height="375" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/m/" media="photo" />
<size label="Medium 640" width="640" height="480" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_z.jpg?zz=1" url="http://www.flickr.com/photos/stewart/567229075/sizes/z/" media="photo" />
<size label="Medium 800" width="800" height="600" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_c.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/c/" media="photo" />
<size label="Large" width="1024" height="768" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_b.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/l/" media="photo" />
<size label="Original" width="2400" height="1800" source="http://farm2.staticflickr.com/1103/567229075_6dc09dc6da_o.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/o/" media="photo" />
</sizes>
<size label="Square" width="75" height="75" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_s.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/sq/" media="photo" />
<size label="Large Square" width="150" height="150" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_q.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/q/" media="photo" />
<size label="Thumbnail" width="100" height="75" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_t.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/t/" media="photo" />
<size label="Small" width="240" height="180" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_m.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/s/" media="photo" />
<size label="Small 320" width="320" height="240" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_n.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/n/" media="photo" />
<size label="Medium" width="500" height="375" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/m/" media="photo" />
<size label="Medium 640" width="640" height="480" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_z.jpg?zz=1" url="http://www.flickr.com/photos/stewart/567229075/sizes/z/" media="photo" />
<size label="Medium 800" width="800" height="600" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_c.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/c/" media="photo" />
<size label="Large" width="1024" height="768" source="http://farm2.staticflickr.com/1103/567229075_2cf8456f01_b.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/l/" media="photo" />
<size label="Original" width="2400" height="1800" source="http://farm2.staticflickr.com/1103/567229075_6dc09dc6da_o.jpg" url="http://www.flickr.com/photos/stewart/567229075/sizes/o/" media="photo" />
</sizes>
youtube sizes 92 -> 426x240 93 -> 640x360 94 ->
854x480 95 -> 1280x720 96 -> 1920x1080 151 ->
128x72