It might be trivial to make custom-fit AirPods in the future

Apple has been continuing to research AirPod design in the hunt for the best fit for most users, but now it may have a way to personalize the earbuds for every individual wearer. The question is how to get precise ear measurements for millions of users.
Detail from the patent showing that fabric AirPods would still retain the basic shape of the current models - image credit: Apple.
As AirPods and AirPods Pro have continued to improve their sound quality, Apple has also attempted to make them fit