There is not “high/low” masseter insertions, but there could be different types of insertions that affect frontal jaw angle appearance significantly.

[xeqri]

So, there are no high or low insertions, let’s get that out of the way, your masseter has to insert at the lower part of your gonion because that’s just everyone’s anatomy, there could be minor differences where it inserts there but not enough for it to influence how your jaw looks.

What COULD actually matter though, is how far along your gonion/mandible it inserts, I’ve noticed that has much more of a variance, I noticed that if you have a good jaw from the front, your masseter insertion will end at the part where your mandible meets the gonion, and then the muscle is condensed in a narrow area at the bottom of it (condensed between the ramus and the end of the end of the gonion, where the mandible starts), which makes it pop outwards more from a frontal view.

But some people, who I’ve noticed have very shitty and round jaws from the front even at very low BF% (this is quite rare though), have their masseter insert like in the middle of the mandible, which then logically, spreads the muscle on a wider surface, which will make it look more washed and round from the front, because instead of being condensed in a narrow space which will make the muscle mass find somewhere to go, which will be outwards, it will have more surface area, and less of a “peak”

I think a good analogy is bicep insertions, when your bicep is longer, it usually stays full and doesn’t have a pronounced peak, but people like Arnold with shorter insertions, have more of a peak because the muscle needs to find somewhere to go.

This is just a theory, but I think it’s pretty logical

 

[UtahParentCenterPSL]

my masseters start where they should at the gonion and end at the top of the cheekbone. what does that mean for me?

 

[Stacyslayer777]

Good frontal jaw angle (most likely)

 

[xeqri]

my masseters start where they should at the gonion and end at the top of the cheekbone. what does that mean for me?

That’s a pretty vague description, that’s basically everyone, if your masseter ends at the meeting point of the mandible and the gonion then good.

But there’s also variance at the insertion of the masseter at the top, under the zygos. Some people have it a bit higher or lower along the zygo, and also how anteriorly or posteriorly it is along the zygo