Calculation of Button Ligne for Garments

Ligne is a French word meaning “line” and it is abbreviated with the letter L. Internationally, ligne is used to recognize button size. Ligne is a liner unit (1/40 inch) used to measure the diameter of buttons. Usually, watchmakers, button-makers, and hat-makers use Ligne to measure their product size. Calculation of Button Ligne for Garments is discussed in the following.

Before calculating button line we should know following measurement:

1 inches = 40 ligne = 2.54 cm,
1 ligne = 0.635 mm
12 Pcs = 1 Dozen,
12-Dozen = 1 Gross,
12 Gross = 1 GG (1728 pcs).

Calculation of Button Ligne for Garments

Relation Between Ligne, Millimeters, and Inches:

Ligne (L)	Millimeters (mm)	Inches
14	9.20	0.35
16	10.5	0.40
18	11.6	0.45
20	12.5	0.50
21	13.5	0.53
22	14.2	0.55
23	14.8	0.58
24	15.0	0.60
27	16.8	0.68
28	17.8	0.7
30	19.0	0.75
32	20.5	0.80
34	21.5	0.85
36	22.9	0.90
40	25.4	1.00

Example-1:
Figure out the ligne of a button with 10mm Dia?

Answer: 10 / 0.635 = 15.75 ligne or 16 L (L means ligne)

Formula: Button Dia in mm / 0.635 or 1 / 0.635 x button Dia in mm

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Example-2:
If the Button length (dia) is 12.7 mm then the Button ligne will be?

Answer:

Button dia (in mm) / 0.635 = button ligne
12.7 mm / 0.635 = 20 L (L = ligne )
Result = 20 L

Example-3:
Per shirt has 6 buttons, total order quantity 3456 pcs, figure out total button quantity in GG ?

Answer: 6 x 3456 / 1728 = 12 GG.

Formula: number of buttons per product X order quantity / 1728 (1 GG = 1728 pcs)

Note: We need to add some extra quantity (minimum 3%) while counting buttons for an order to save us from risk in case of shortage due to defective & damaged.