How do I determine my ring size?
If you don't know your ring size or you think it has changed, any local jeweler will size you for free.
If you don't have easy access to a local jeweler, I can send you a ring sizer free of charge, just send me an email with your mailing address.
If the ring you are interested in has a thicker band, I recommend you go up half a size.

Vintage gold-filled Ostby Barton uranium glass ring
A ring with a thick band like this should be sized up.half a size
Please keep in mind that your finger size can change depending on the weather. Heat will make your fingers swell, and cold will shrink them. If you are concerned about this, I recommend going in between sizes, or sizing for one of your larger fingers to wear in cold weather, and then you can wear it only your ring finger in hot weather.