Putting together the perfect charm necklace isn't easy. Finding just the right color of 9k rosy/buttery gold chain is a challenge, and then attaching yr charms to it without a metal clashing situation? We might be able to help there. These split rings were all made in the late 19th c from that mellow 9k gold alloy that you just can't reproduce these days. We even have a few chains to match, if you're looking.
9k rose gold
2 large rings are 7/8" diameter and 2.2mm wide, 2 small rings are 3/8" diameter and 1.9mm wide