Marla Aaron 14k Yellow Gold Baby Lock w 16” Rolo Chain with Yellow Gold loops. Retails for $685 There are some scratches on closure that are not noticeable when wearing. The Babylock is our most popular lock--used as a connector, a clasp, a charm holder and for many, the very first lock that they purchase. It measures 1.5cm x 9mm with a thickness of 2mm, closure is 4mm. The Babylock fits on all chains, or strands. Ideal for a necklace.