About this site
Know Your Face Shape documents how face shape classification actually works — specifically, that it is not standardised, and that two tools looking at the same face will often hand you two different labels. This site exists to show you the arithmetic behind that, so you can stop asking which detector is right and start reading your own four measurements.
Who runs it
One person. It is an independent editorial project, not a company, and there is no team behind it. Pages here are written and maintained by the editor behind Know Your Face Shape, reachable at contact@knowyourfaceshape.com.
Why it exists
Most face shape guides present a single set of thresholds as settled fact. They are not settled. Four published rule sets disagree about where oval stops and oblong starts, and a length-to-cheekbone ratio of 1.55 comes back oblong on two of them and oval on the other two. Worse, they do not even agree on what the jaw measurement is — one method traces the curve from ear to chin and doubles it, another takes the flat width corner to corner. Those two produce different numbers from the same face, and the doubling method can manufacture a triangle result out of a face that is not bottom-heavy.
A second problem: a lot of guides still tell you to use face-analysis filters inside Instagram. Meta discontinued Meta Spark and third-party effects stopped being available on Instagram and Facebook effective 14 January 2025. Those instructions have been describing something that does not exist for over a year.
How pages here are written
Two rules, and they are the reason this site is worth reading rather than the fiftieth copy of the same list:
- Every number is attributed to the tool that published it. When you see a threshold on this site, the name of the rule set it came from sits next to it. You can go and check it.
- Where no source publishes a number, the cell says so. It does not get filled with a plausible-looking range. Several rows of the measurement table on the homepage read Not published for exactly this reason — no published numeric threshold for those shapes was found in the rule sets checked. An invented number would look more complete and be worth less than nothing.
If a number here is wrong, or a tool has changed its published thresholds since a page was written, that is worth an email. Corrections get made on the page itself.
What this site is not
It is not affiliated with, paid by, or endorsed by any tool or company named on it — that includes goldenratioface.net, faceshapedetector.app, faceshapetool.com, LoopedInLooks, Meta and Google. They are named because their published rules are the thing being compared. Naming them is the point.
Nothing here is medical, dental, surgical or professional advice. Face shape classification is a grooming and styling convention, not a clinical measurement, and none of the rule sets discussed publishes an error rate or a confidence figure beside its answer.
How it is funded
By advertising served by third-party ad networks. That is the only revenue source, there is no paid placement, and no tool discussed on this site pays to be discussed or to be left out. What ad networks collect is set out in the privacy policy.