In button sizing, the L stands for “ligne”, which is a traditional unit of measurement for diameter used specifically for buttons. 1 ligne (1L) ≈ 0.635 mm
Suggested use cases for each button size:
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Small (18L / ~11 mm) – perfect for shirts, blouses, and light garments
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Medium (24L / ~15 mm) – ideal for jackets, cardigans, and everyday clothing
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Large (36L / ~23 mm) – great for coats, bags, or statement details
