How to Read Pendant Measurements

Start with the label beside a pendant measurement. “Diameter”, “height × width”, “stone size” and “cluster width” each tell you which part of the design a number describes. Once you know that, you can compare the same feature across different listings.

Diameter: across a round design

A diameter runs across a circle through its centre. The Marisol Golden Sun Necklace listing gives its sun pendant a diameter of 2.1 cm, equivalent to 21 mm. Use that figure when comparing the width of round pendant designs.

Height × width: two directions

Height describes the vertical direction; width describes the side-to-side direction. Keep the labels and their order together. The Celine Opal Turtle Necklace listing gives an approximate pendant size of 17 mm high × 12 mm wide. In centimetres, those figures are approximately 1.7 cm high × 1.2 cm wide.

Compare height with height and width with width. For a design whose measurement scope is unclear, confirm which parts are included before ordering.

Stone size: the centre detail

The Xanthe Emerald Necklace listing identifies a green zirconia centre and gives its approximate stone size as 6 mm high × 4 mm wide. That is approximately 0.6 cm high × 0.4 cm wide.

Use these figures when comparing centre stones. To compare the complete pendant, look for a separate overall measurement that includes the relevant surrounding parts.

Cluster width: across the group

A charm-cluster width describes the combined side-to-side span of the group. The Lulwa Pearl Shell Necklace listing gives its three-charm cluster as approximately 25 mm wide, or 2.5 cm. Keep that figure associated with the whole group when comparing designs.

Use the same units and the same label

NIST's length-unit reference confirms that 10 mm = 1 cm. Divide a millimetre value by 10 to express it in centimetres, or multiply centimetres by 10 to express them in millimetres. For example, Marisol's 2.1 cm diameter and 21 mm diameter are the same stated measurement.

Before comparing two pieces, check three things: the part being measured, the direction and the unit. Keep any “approximately” qualifier supplied by the listing. If a detail you need is missing, contact the Reef & Rose team with the product name and the measurement you want to clarify.

To browse by outline, visit the pendant-shape visual guide. The pendant and charm guide explains the style terminology, while the necklace layering guide covers chain length and placement. Browse the necklace collection to compare current designs.