Sizing Guides Neckalces To measure your desired necklace length, use a piece of string to measure the desired length. Then, use a measuring tape or regular ruler to measure the piece of string. Please note, the size chart is based on the sizing of our necklaces. 12" - Choker Length 16" - Collar Length 18" - Princess Length 20" - Matinee Length 24" - Opera Length 30" - Rope Length Bracelets Wrist Measurements Bracelet Size 5.75 - 6.75 Small (S) 6.75 - 7.75 Medium (M) 7.75 - 8.75 Large (L)