Assuming none of the obeasts are approaching TLC levels, I'd wager none of them are over 1.0 carats in the largest stone, perhaps 1.75 carats total stone weight. A couple of the uglier ones might be sterling silver with diamond chips, because a decent stone plus setting shouldn't need gussying up to reflect the quality of the cut and skill of the jeweler. I do have a tale of a 5 carat on a swine, but that was a few years ago.