If you are looking for a medium gauged 6mm open jump ring with medium strength, this is a good one. I use it for 2 specific charms (purchased through another supplier) that have smaller top loop. This is the largest gauge that will fit but is still strong enough to hold a charm on a bracelet. I make children's jewelry, so I prefer a larger gauge so that they can't pull the charms off, so this is not my favorite, but it does work well in situations where you need a slightly smaller gauge. I feel this is equivalent to about a 21g.
I like this jump ring, works with lots of different things - earring, charms, pendants.