This listing is for 100 bells. Bells are mixed colors, steel with matte (not shiny) colors, 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.