I think this is really useful for the guys but the sizes are hard to gauge as a few of the circles seem similar when I placed my ring on it. Upon double checking with the conversion chart, it was the wrong size...
I think I'm a 6 and I thought mine are abnormally small ... ...
You don't have to be big to have a larger ring size, you probably just have a more medium/average bone structure. I know I am very small boned so while I am 5'6" (which is a little above average in height) I have friends that are much more petite than me but have size 7 fingers and like 8 or 9 shoe size. I have a size 3 finger and a 6.5 maybe size 7 shoe, my wrist is also less than 5 inches around. I guess what I'm getting at is it's not you, it's those of us who are just very small bones, I actually can't believe how much smaller my hands and feet are than other people I know who are 4 or 5 inches shorter than me, it doesn't seem to make sense sometimes......