Here are some reference videos for you to consider:
https://www.youtube.com/watch?v=AU7BuRhXltk
https://www.youtube.com/watch?v=jr3Nfk93VAg
You might consider making your own thumb ring:
https://www.youtube.com/watch?v=zfEK-8u3dso
https://www.youtube.com/watch?v=XP93A0UCUgQ
Just FYI: The cylindrical thumb ring actually produce a cleaner release than the tear shaped one.
Do they? I would have thought it's easier to pinch the soft skin of your inner thumb with those ?
I ended up finding one actually (after 1 hour of Google searches) , sold by 3Rivers Archery and I ordered one to fit my thumb. http://www.3riversarchery.com/Thumb+Rin … eitem.html
It's a little expensive for such a small piece of equipment, but since it's hand-made, I guess it's about right.
Also, for your info, the bow(s) I'm planning on shooting are sold on ebay by this store: http://stores.ebay.ca/HandMadeBow?_trksid=p4340.l2563 and the guy really sold a lot and has really good reviews !
First do one by yourself, wrapping a piece of leather around your thumb. With the time will have the right shape and perfect confort.
Later you can ask someone to make one for you. Don't buy online if is for practical use, need to be exactly precise.
M.
Well I guess it's too late for that then... I already ordered one. If it doesn't fit well or I don't like it though, I may consider making my own... if I can manage it.