Stacking rings - which finger?

[Beaverfeaver]

I am looking at buying some stacking rings.

Something like these:
www.alisonmoore.co.uk/ourshop/prod_2501183-Velvet-Amethyst-and-moonstone-silver-stacking-rings.html

However, I can't decide which finger for them to go on and will obviously need to decide before i order them.

What finger do you think is right?

Gorgeous rings!

I have several stacking rings and wear them in various combinations on the middle finger of my left hand. I already have 2 rings that I wear on my right, so didn't want to overload & I'm not engaged/married, so the stacking ones are the only thing on my left.