Approximately 27x5x9mm striped sterling silver donut bails, 20mm inner diameter. Measurements are based on closed dimensions and include top loops. JBB Findings is internationally known as a manufacturer of quality silver bails. Loops fit 2mm (or slightly larger) chain or cord. Squeeze the bail gently to align the loops after inserting donut. Please handle with care - these bails are not designed to be opened and closed repeatedly.