Good size key rings bulk: the keychian rings is 25mm diameter and the thickness is 1.8mm, the chain of key ring is about 7/8 or 2.25 cm length, the open ring of key rings is about 9mm diamerter and the thickness is 0.8mm, total length about 2.2inch/56mm Suitable quantity key rings key chains: Key chain rings comes with 60 key chains with connector and a separate baggie of opem jump rings (60pcs) Easy to work keychain rings: These keychains come with the last subchain separately so it's easy to connect to other things rather than trying to pry the last chain apart Long using life key chains: This keyring are made of high quality silver-toned nickel metal, and the jump rings of key ring are thick, sturdy, built to last. Suitable for craft, DIY. It can be used as a gift for Christmas, Mother's Day, Father's Day and other holidays Nice workmanship: We could use them for our homemade centerpieces; very nice for a craft with shrinky dink paper; working great for making 3d printed pieces into keychains and used these for a Mother's Day craft