I have several photos of my husband's hands doing various things that I was considering submitting. However, he does wear a custom ring. Would I need some sort of release to submit the photos?
It's impossible to answer this without seeing the image in question. If the ring is clearly unique and identifiable then yes, you would likely need a release. Especially if it is the primary focus of the image.
Please review our legal guidelines linked here: https://helpx.adobe.com/stock/contributor/legal.html