FOOL. This is a set of guidelines for female legwear. It is a crucial tool for the establishment of proper zettai_ryouiki. Do not speak ill of that which you do not understand!
@kevo Having gone through the Notes concerning Knee-highs changing a few of them to thighhighs for correct context (not to mention periodically going through all of the posts on Danbooru fixing legwear tags) I wish everyone on Earth would recognize the differences in legwear.