Custom ear molds are the gold standard of connecting hearing aids to an individual's ear. They have been replaced in many cases with 'domes' that do not require the kind of fitting a custom ear mold does.

Custom ear molds require the same kind of precise fitting that dental inlays do. It takes a professional with good dexterity to get it right. It's also quite likely that a custom fit earmold might need some filing down even after it's fit. That's another reason why being able to go back to the provider without further cost is important.

It's a lot easier to fit a hearing aid with domes, which do come in different sizes. But, if they keep slipping out or aren't working very well ASK for fitted earmolds. This is another one of those places where a bit of learning before buying might make sense.

I have only had one pair of hearing aids but am currently replacing them. I've had them 7 years and my hearing and the advancements have changed a lot. My situation is rather unique in that I had cancer in my parotid gland. After surgery where they removed part of my ear canal I lost most of my hearing in that ear....age took the other ear. I had a mold in my right ear for several years but unfortunately due to the radiation, my skin inside my ear is like tissue paper so it irritated it until it bled. I had to give up on it and go with the domes. I have had really good luck with those but my problem now is I get a lot of feedback and I am hearing but not understanding what is said. Let me know how your search is going.

I found the custom molds made a significant difference for the better.