The average ring size is an L. If in doubt it is best to order one of the larger sizes and have it resized later.
A Tip to Find Her Ring Size
Finding out your partner's ring size in secret can be a challenge, however we have spoken to a number of people who reveal that there are a few great ways to go about this. The most popular is to measure an existing ring they own. Just be aware of which finger it is meant for. You can measure the circumference of the ring and then let us know the exact measurement you found in mm and we will work out the correct size for you. If in doubt, the average UK ring size is an L and we will resize your ring for free.