Necklace Length Guide
Compare lengths, find the right fit, and plan sizing for your custom necklace collection.
Necklace Length Guide
Find the right necklace length for your design, your customers, and your collection.
Compare lengths in inches and centimeters, learn how to measure a necklace, and understand what to confirm before custom production.
Necklace Length Chart: Inches to Centimeters
Necklace length is measured around the necklace, not vertically down the chest. Use the chart below as a starting point, then check the fit on your intended wearer.
The same length can sit differently depending on neck circumference, body proportions, chain thickness, and pendant design.
| Length | Exact Conversion | General Styling Reference |
|---|---|---|
14 inches | 35.56 cm | Close-fitting styles; check neck circumference carefully |
16 inches | 40.64 cm | Short necklaces and the upper layer of a necklace stack |
18 inches |
45.72 cm |
Everyday chains and pendant necklaces |
20 inches |
50.80 cm | A longer pendant look or a middle layer |
22 inches | 55.88 cm | Longer chains with additional room around the neckline |
24 inches | 60.96 cm |
Long pendant necklaces and styling over clothing |
30 inches |
76.20 cm |
Long necklaces and statement layering |
Sizing note: These are exact unit conversions, not production specifications. A 45 cm necklace and an 18-inch necklace differ by 0.72 cm. Confirm the required measurement and unit before ordering.
How to Measure a Necklace
Measure a Necklace You Already Like
Open the necklace and lay it straight on a flat surface without stretching it. Measure from one end of the finished necklace to the other, including the clasp and end fittings. Record any extension chain separately.
Check the Fit with String
Place a non-stretch string around your neck and adjust it to the position you prefer. Mark the ends, lay the string flat, and measure it with a ruler.
Confirm with the Actual Design
Try a sample with the intended chain thickness and pendant. A string helps estimate length, but a finished necklace may drape differently.
Chain Length, Extender Length & Pendant Drop
Base Necklace Length
The base length is the finished necklace length before the extension chain. Confirm whether the clasp and end fittings are included in the stated measurement.
Extension Chain
An extender provides an adjustable wearing range. For example, a 40 cm base necklace with a 5 cm extender offers an approximate adjustment range of 40–45 cm.
Pendant Drop
Pendant drop is measured separately from the necklace length. Specify the distance from the pendant’s attachment point to its lowest point, including the bail where applicable.
Example specification:
Base necklace: 40 cm, including clasp and end fittings
Extender: 5 cm
Adjustable range: approximately 40–45 cm
Pendant drop: 2 cm, including bail
A 2 cm pendant adds a visible drop below its attachment point; it does not turn a 40 cm necklace into a 42 cm necklace.
Choose a Length for Your Necklace Design
Fine Chains & Small Pendants
Compare shorter and medium lengths on your target wearer. Check how the pendant sits against the neckline and whether an extender would improve flexibility.
Chunky Chains & Beaded Necklaces
Allow for the thickness of the design. Larger links and beads can create a closer fit than a fine chain of the same measured length.
LCC
Start with different lengths, such as 40, 45, and 50 cm, then test the complete set. Adjust the spacing for pendant size, chain thickness, and the intended look.
Specify Necklace Sizing Before Custom Production
A clear size specification helps your brand, designer, and manufacturer work from the same reference.
For your OEM/ODM necklace project, share:
Target wearer and intended fit
Base necklace length and measurement unit
Whether the clasp and end fittings are included
Extension chain length
Chain style and width, or bead diameter
Pendant dimensions and drop
Required length tolerance
Quantity required for each length
Confirm these details on the sample and specification sheet before approving bulk production.
Need help defining your necklace specifications? Send Haosen your design and target fit for review.
FAQ
1. What is the difference between a 16-inch and an 18-inch necklace?
An 18-inch necklace is 2 inches, or 5.08 cm, longer than a 16-inch necklace. Its position on the body depends on the wearer and the necklace design.
2. Is 45 cm the same as 18 inches?
No. An 18-inch necklace measures 45.72 cm. When ordering custom necklaces, specify whether production should follow centimeters or inches.
3. Does necklace length include the clasp?
Measurement conventions can vary. For this guide, the base necklace length includes the clasp and end fittings, while the extender is recorded separately. Confirm the same method with your manufacturer.
4. Does pendant size affect the fit?
Yes. Pendant size and weight can affect how a necklace hangs. Record the pendant drop separately and check the complete design on a sample.
5. What does 40 cm + 5 cm mean?
It usually describes a 40 cm base necklace with a 5 cm extender, providing an approximate wearing range of 40–45 cm. Confirm what is included in the base measurement.
6. Can I order different lengths for the same design?
Send your preferred lengths and quantities for each size. Haosen can review the design and confirm the available production options.
Plan the Right Fit for Your Necklace Collection
Share your design, preferred lengths, chain specifications, and order quantities. Our team can review the sizing details with you before sampling.