What jawline analysis looks at
- Gonial angle. The angle at the corner of the jaw where the vertical and horizontal parts meet. A sharper angle usually reads as a more defined jaw.
- Jaw edge visibility. How clearly the lower border of the jaw shows against the neck.
- Proportion. How the jaw relates to the cheekbones, chin and the rest of the lower face.
- Symmetry. Whether the left and right sides match.
What changes how defined a jawline looks
| Factor | Effect |
|---|---|
| Bone structure | Sets your baseline. Largely fixed. |
| Facial leanness | Less fat over the jaw makes the edge more visible. |
| Posture | Forward head posture can soften the jaw-to-neck line. |
| Water retention and sleep | Puffiness blurs the jaw edge. |
| Photo angle and light | Low angles and flat light change how defined it looks. |
What you can work on
You cannot change your bone structure with habits, but you can change what sits on top of it. The most reliable levers are body and facial leanness, hydration and sleep, and posture. Tongue-posture techniques often called mewing are popular online, but good evidence for changing adult jaw structure is limited, so treat them as a habit to try rather than a guaranteed result. Hexum’s protocol is built from your own scores, so it focuses on the areas where you have the most room to gain.
Across Hexum users, the average Overall Score improves by 35% from first scan to week 6.1
1 Average change in Hexum Overall Score, first scan to week 6. Based on Hexum’s own user data; not a published study.
Measure your own jawline
Take one front-facing photo in even light and Hexum scores jawline definition alongside symmetry, skin quality, facial thirds and canthal tilt. Read our guide to canthal tilt or see the full looksmaxxing app overview.
Try it yourself. Hexum is free to download and your first scan is free.