Buy the best pearls you can afford, then choose the clasp. A decorative jeweled clasp can always be purchased later. Select a cultured pearl necklace, too, for its effect on your appearance and personality. Long necklaces are slinky and sexy. Short necklaces can be demure or sophisticated.
Dog collars enhance a long neck.
Longer strands slenderize and appear to elongate the neck. For fair skinned women, roseate hued pearls are most flattering. Cream and gold color pearls set off darker skin tones best. Should nestle around the base of the neck. Halfway between choker and matinee length.