Building Bracelets vary in size to allow for stackability (Medium-Large ish). If you have questions about the sizing please email me at: firstname.lastname@example.org
They have sterling silver hardware that is long lasting and durable. Over time it will temporarily tarnish. To polish the chain just submerge in warm soapy (dish soap) water and scrub lightly with a toothbrush and they will be good as new. The chokers are made with borosilicate glass and are constructed in a strong design. However, it should not be dropped from a high distance.