These sterling silver bails will easily slide over any chain, cord or strand up to 3mm in diameter. The loop at the bottom of the bail is at a right angle to the bail. The loop can be gently opened and closed if necessary (please do not open more than once or twice as you will risk breakage).
Measurements: 12mm tall including bottom loop, 4mm wide at top. Loop at bottom is 4mm in diameter, interior diameter 2mm, .9mm thick.