What a sweet charm this is! And, how perfect for beach jewelry or memory project. We cannot be sure if these are real shells, but they sure appear to be. We think they might be vintage, too, but we can't be sure of that either. But, we are sure that each one is slightly different from the next (this is what leads us to suspect that they are real shells).
The average size is about 3/4 inch wide by about 1/2 inch high. The faux pearl is 5 mm in diameter. Each little shell has a pierced hole for you to add a thread or a jump ring.