If you have a front fringe, you'll know it gets long pretty quickly, way before you feel like going to the hairdressers to snip the rest of your hair. This is because a front fringe to your eyebrows doesn't have to grow very far to get annoying.

This method of cutting your fringe is flattering, cuz the hair line curves slowly upwards in the middle and feathers itself out a lot. so it never looks like it's just been cut (and it covers up a lot of mistakes), leaving room for error to only remain in how short you choose to cut it, rather than a mess-up in how you cut it.