This is a beautiful ring. I bought it for my index finger and ordered size N; I usually take size M but I thought that because the ring is quite wide, a larger size would be better. It was far too small, so I immediately ordered the size P and returned the smaller one the next day. The replacement arrived the very next day, very impressed with the speed, and the fit is perfect. I'm a bit annoyed however that the cost of returning the item (over £6) was deducted from my refund! Overall though, very pleased, although I do think that ring sizing should be more universal, especially when buying on the internet!