Also there are Special:FilePath and thumb.php. I'm not sure how this affects caching though. http://commons.wikimedia.org/wiki/Special:FilePath/Example.svg http://commons.wikimedia.org/w/thumb.php?f=Example.svg&w=420 -Liangent On Jul 3, 2014 4:50 AM, "Emilio J. Rodríguez-Posada" <emijrp(a)gmail.com> wrote: Hello Markus; The URL of a Commons image is build like this: https://upload.wikimedia.org/wikipedia/commons/x/xy/File_name.ext Where X and XY are the first char and first&second chars respectively of the md5sum of the filename (replacing the spaces with _). For a 200px thumb: https://upload.wikimedia.org/wikipedia/commons/thumb/x/xy/File_name.ext/200… The SVG files are a special case, therefore .png is appended to .ext, being .ext.png. For SVG doesn't mind to use big thumb sizes, but when file is JPG, don't try to generate a thumb bigger than the original file or you will get a beautiful error. Regards 2014-07-02 22:33 GMT+02:00 Markus Krötzsch <markus(a)semantic-mediawiki.org>rg>: Dear Wikidatarians, _______________________________________________ Wikidata-l mailing list Wikidata-l(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-l