Rings can be adjusted, to a point. "In order to resize a ring, you have to cut the band and either stretch or fold the ring to accommodate the size change," Overton said. "If you have an infinity band with diamonds all the way around, it's particularly tricky [because] folding the ring can loosen the settings, and stretching can end up crunching the stones a little bit."
In Jogia's experience, most engagement rings can safely be sized up or down two sizes and should never need more alteration than that or the structural integrity of the ring will be affected. "Stones could become loose and potentially fall out. In many cases, you will not end up with a perfectly round ring," he said. If you anticipate needing to resize and you want diamonds on the band of your ring, you may want to opt for a setting with diamonds set just three quarters of the way around. Generally speaking, it's easier to size down than up.
