Necklace Length Guide for Adults (in cm) Name Length (cm) Where It Sits on the Body Collar 30 – 35 cm Mid-neck Choker 35 – 40 cm Base of the neck Princess 40 – 45 cm On the collarbone Matinee 50 – 60 cm Between collarbone and bust Opera 65 – 90 cm At or below the bustline Rope / Lariat 90+ cm Toward the waist or hips Necklace Length Guide for Children (by Age) Approximate Age Length (cm) Ideal Fit on a Child 1 – 3 Years 25 – 30 cm Resting near the collarbone 4 – 8 Years 30 – 35 cm Standard everyday drop 9 – 12 Years 35 – 40 cm Hits just below the collarbone 13+ Years (Teens) 40+ cm Shifts into standard adult sizing