One of the many nice benefits of bentwood rings is the opportunity to go very THIN or very NARROW while still maintaining durability.
Solid or laminate-cut wooden rings must maintain a certain thickness in order to keep them from becoming overly fragile. This is one reason why those types of rings are done in the “chunky” style.
Bentwood ring construction allows for very delicate-looking designs and gives an opportunity for contrast between his-and-hers sets.
Bentwood rings can also be made narrow, so that they protrude from the finger very little.