This listing is for 100 bells. Bells are mixed colors, aluminum with a shiny/reflective finish, these jingle bells have clappers. 6mm is about 0.2 inches. You get similar to pictured, color-wise, an even mix of colors but no exact counts of each.
A single 6mm bell does not ring very loudly. It is almost like a quiet clicking sound. If used in clusters of 4-5 bells they make a very nice delicate ringing sound.
Very small bells are a jewelry supply great for accenting charm bracelets, necklaces and earrings or embellishments for belly chains and anklets.