How to create a max distance

[[Za...]]

I am wondering how to create a max distance between these two outside features that could be considered two ellipse, curves, arcs, or circles. I've made many attempts at curve distances or edge distances and slotted lengths and everything comes out slightly different or just doesn't work. Any advice on creating a max distance between two rounded features?

[[Ma...]]

I would use caliper disc from both sides to obtain 2 points, which can be then used for 2point distance

[[Je...]]

Hello Zachery,

I would use touching discs to measure the outer points (creating a silhouette before is also an option).

Best regards,

Jens Braun