This is a set of round jump rings in the following sizes: 4mm, 5mm, 6mm, 8mm, 7mm, and 10mm. 4mm: 419 pieces, 5mm: 368 pieces, 6mm: 254 pieces, 7mm: 135 pieces, 8mm: 84 pieces, 10mm: 3 pieces, totaling 1276 pieces. Each piece has been counted by hand, but there may be slight variations. Thank you for your understanding. Thank you for viewing.