Old Chinese Puzzle Ring Bats 4 Band White Metal Size Approx M / N (6 1/2). Measuring as a L & 1/2 on the sizer but shape of bands means it's a bit bigger, I'm an N & 1/2 (6.75) and it fits me. Came with old silk thread attaching the rings together, which I've removed. May arrive separated ready to solve. Tested for silver and there is a low silver content,  so could be silver plated or just a low grade of silver.