Each interlocked circle is a 1/2 inch in diameter.  Each necklace is sterling silver or 18 K gold vermeil (sterling silver dipped in 18 K gold).  This adjustable necklace from 16-18 inches can be worn in the shower, swimming and while sleeping.  The chain on this necklace has set small silver or gold round beads in it.  See third photo for thickness of the love circles.