Anyone who is studying the world of wedding and engagement jewelry for the first time will want to establish a baseline for price, style, material and source. But what about whether it will actually fit on your finger? Ring sizing seems custom fit for confusion. A size 8 ring in the United States is an 18 in Germany, a 16 in Japan and a Q in the United Kingdom. In all those places, it can be a difficult ring for women to try on in the store because jewelers all over the world often don’t keep it in stock. As for plus sizes (usually categorized as U.S. size 10 and above for women), forget about it. Icerings.us offers the full range of U.S. standard sizes so you don’t have to pull out a map or check inventory — but, unfortunately, more ring sizing challenges still await.

Finger size fluctuates slightly from day to day and dramatically from season to season. Because hot days, salty meals, pregnancy and arthritis all have their hands on the dial that controls the diameter of your digits, there isn’t necessarily a “perfect fit.” Even if you could arrive at a stable measurement for the part of the finger where the ring is going to sit, you still have to account for variables like the knuckles. To top all of this off, the person who is buying an engagement ring might be trying to do it on the sly, which makes the process that much more daunting. Say some helpful co-conspirators, like roommates or siblings, manage to snag a bit of heirloom jewelry she wears on the ring finger of her right hand. Guess what? Finger size can vary from dominant to non-dominant hands, so there’s still going to be a certain amount of guesswork involved. But don’t despair. We are here to help you vault over all your ring sizing obstacles!