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Length • Exact factor

Millimeters → Lignes

mm → ligne

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What it is

The ligne (often written L) is the button-trade unit for diameter. 1 ligne = 1/40 inch = 0.635 mm. It is not the old Paris typographic line, not Chinese market cun, and not Japanese wasai sun.

How to use

Divide the millimeter diameter by 0.635 to get ligne. Equivalently multiply by 40/25.4 (1 inch = 25.4 mm = 40 ligne). 15.24 mm = 24 ligne. The converter above uses this factor.

ligne = mm × 1.57480315

Example: 1 mm = 1.57480315 ligne

Common uses

Shirt buttons about 16-18 ligne (about 10-11.5 mm); suit front buttons often 24-28 ligne; coats 32-36 ligne. A 3/4-inch button on a pattern is 30 ligne. For buying buttons, buttonholes, and imported notions.

Conversion tips

40 ligne = 1 inch. 16L ~ 10 mm, 18L ~ 11.4 mm, 24L ~ 15.2 mm, 30L = 19.05 mm. Do not mix ligne with denier in the same column.

mm → ligne Reference Table

mm ligne
10 mm 15.7480315 ligne
11.43 mm 18 ligne
15.24 mm 24 ligne
17.78 mm 28 ligne
19.05 mm 30 ligne
20.32 mm 32 ligne
22.86 mm 36 ligne

Calculated from factors marked exact in the unit registry.

Frequently Asked Questions

Length More Conversions

m → ftft → mcm → inin → cmkm → mimi → kmmm → inin → mmm → ydyd → mft → inin → ft里 → kmkm → 里尺 → mm → 尺mi → mm → mift → cmcm → ftcm → mmmm → cmkm → ydyd → kmnmi → kmkm → nmiyd → ftft → ydmi → ydyd → mimi → ftft → mim → cmcm → mm → mmmm → mkm → mm → kmnmi → mimi → nmiin → ydyd → inµm → mmmm → µmft → mmmm → ftm → inin → mly → kmkm → lyyd → cmcm → yd尺 → cmcm → 尺寸 → cmcm → 寸尺 → cmcm → 尺寸 → cmcm → 寸ligne → mmligne → cmcm → ligneligne → inin → ligne寸 → inin → 寸尺 → inin → 尺寸 → inin → 寸尺 → inin → 尺丈 → m里 → min → µmµm → mnm → µmmi → 里dm → cmpm → cmkm → pmlight-s → mkm → mmly → cmcm → nmin → lyµm → incm → kmcm → lycm → µmcm → mift → lyft → nmiin → mikm → cmly → inly → ydm → nmµm → lynm → lynm → minm → mmyd → lyyd → mmyd → pmµm → pmpm → kmpm → mmcm → dmdm → kmdm → mdm → mmdm → ydin → pmkm → dmlight-s → dmm → dmm → pmmi → dmmi → pmmm → dmmm → pmpm → inpm → lypm → nmau → cmcm → auftm → mmftm → nmft → ftmau → µmftm → inftm → kmftm → 里ftm → mftm → mily → ftmmi → auyd → ftmpc → cm

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