Hand strung Surfer SUP Style Necklace8mm Square Cut Chip White Puka Clam Shell Beads16 inch 18 inch 20 inch 24 inch lengths - To determine length, please check the last picture above for an idea of what each length looks like on an average man or woman. - Please note, the large chip shells on this necklace will make it fit a bit tighter than normal. Consider this when choosing length. - Lengths are approximate. Hand strung necklaces with natural shells can vary a bit in length.