A useful starting point
Measure the full chain length and check the pendant drop separately. Use 1 inch = 2.54 cm for conversion. Where a necklace falls depends on your proportions, the chain and the pendant, so a length chart is a reference rather than a fit promise.
An inch-to-centimetre reference
These are exact mathematical conversions, not OVE product sizes or a chart of where a necklace will sit on a body. A seller may round the measurements in a listing.
| Chain length, inches | Equivalent, cm |
|---|---|
| 14 | 35.56 |
| 16 | 40.64 |
| 18 | 45.72 |
| 20 | 50.80 |
| 22 | 55.88 |
| 24 | 60.96 |
Measure a necklace you already enjoy
Lay the unfastened chain flat alongside a ruler without stretching it. Record the length from end to end and note whether your measurement includes the clasp. If it has an extender, record the shortest and longest usable settings separately.
Measure the pendant independently, including the connecting loop if it contributes to the drop. When comparing a new piece, check the seller’s method rather than assuming its stated length includes the same components.
Check placement with your own clothes
Use an existing necklace as the reference whenever possible. Compare its position with the neckline of a shirt or dress you wear often. A pendant may sit differently from a chain of the same advertised length.
Tiffany’s size guide also suggests testing a proposed length with string. If you use a soft measuring tape or string, keep it loose and comfortable; the purpose is to visualise the length, not to tighten it around your neck.
Think in relationships, not fixed rules
A shorter necklace can define the top of an arrangement while a longer pendant provides a focal point. Start with two lengths, photograph the result and compare it with one necklace worn alone. Add a third only when it creates a distinct role.
Our layering planner helps compare total lengths and convert units. It deliberately does not predict the position on a body. Use your own try-on and the actual product specifications to make the final choice.
Keep these details together
Before ordering, record the chain length, extension range, pendant dimensions and included pieces. Confirm the material and care separately. A styled photo may show an added chain that is not part of the product being sold.
If the purchase is a gift and you cannot confirm the recipient’s preferred length, keep the shortlist flexible until the seller’s exchange conditions are clear. Do not use a standard length name as a guarantee of suitability.
A little more clarity
Your questions, considered.
Is an 18-inch necklace exactly 45 cm?
The exact conversion is 45.72 cm. Product listings may use rounded nominal measurements; confirm the actual dimensions and measurement method.
Does necklace length include the pendant?
Do not assume it does. Listings may describe chain length and pendant drop separately; ask the seller how each is measured.
About these notes
Prepared for OVE JEWELRY with AI-assisted research and writing. These are general styling and buying notes, not a report of product testing. Editorial images are AI-generated concepts. The OVE collection is not yet available to order.
Further reading
Sources consulted November 2, 2026. References provide general information and do not imply endorsement of OVE.
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