These cufflinks measure approx. 5/8", at their widest, and are marked on one side of the piece. The silver content is probably 900 whereas Sterling is 925. Please look at all photographs, as they are part of the description and ask any and all questions prior to looking. Thank! Launched from my store - Powered by Highwire.com Track Page Views With Auctiva's FREE CounterEvery buyer gets a MyStoreRewards invitation for cash back