Board Thread:Wiki discussions and announcements/@comment-1990160-20140711013526/@comment-1990160-20140712005424

@Draven Your assumption is that all ranges are known. This is not so. Sources of confirmed ranges are Riot-official: site & patch notes. All others are made through estimation, which is unreliable due to hitboxes, visuals, and lack of clear reference.

@Elph That's more like "rounding", sort of like ward behavior.