These solid glass "Niagara" rings feature pretty, swirled ridges. The sizing is approximate as the bands are irregularly shaped, not round (actually more U-like), and thus not accurately measurable on a sizing stick, but the ring will not be smaller than the stated size. As you can see in the photos, it is normal for there to be some tiny bubbles in the glass. Most measure just a touch under 1" across the front.
Red "Niagara" | $11 USD