A shank button is a type of button that has a small loop or protrusion (called a shank) on the back, instead of holes through its face. This shank allows thread to pass through and gives a small gap between the button and thShank buttons are especially common in outerwear, tailored jackets, and higher‑end dress shirts because they add dimension and durability without compromising style.
Shank Button Size Chart
| Ligne (L) | Millimeters (mm) | Inches (in) |
| 14L | 10mm | 1/6" |
| 16L | 10mm | 3/8" |
| 18L | 12mm | 3/8" |
| 20L | 13mm | 1/2" |
| 24L | 15mm | 5/8" |
| 30L | 19mm | 3/4" |
| 33L | 20mm | 13/16" |
| 36L | 22mm | 13/16" |
| 40L | 25mm | 1" |
| 48L | 48mm | 1/2" |
| 54L | 54mm | 3/4" |
| 60L | 60mm | 5/8" |
Additional Recommendations for Choosing the Right Size
1.Consider garment function
2.Fabric thickness and layers
3.Proportion and aesthetics
4.Test with samples
How to Measure Shank Button Size
Unlike sewn buttons, buttons with handles require measuring the front diameter and handle height.
Step 1 – Measure the Button Diameter
Use a ruler or caliper to measure the widest point of the button face
Step 2 – Measure the Shank Height (Back Loop)
Shank height is the distance from the base of the button to the fabric once sewn.
Tips：
Buttons can be measured in mm, inches, or lignes (a traditional unit used in button manufacturing).
1 ligne ≈ 0.635 mm
10mm ≈ 15.7 lignes
Customization and Bulk Purchase Options for Shank Buttons
As a professional garment accessories manufacturer, we offer options for custom sizes, materials, and shapes.
Custom sizes: Most manufacturers can produce non-standard sized buttons to match specific garment designs or functional requirements.
Custom materials: A variety of materials are available, including metal, plastic, resin, wood, and even mixed materials, to achieve unique effects.
Custom finishes: Gold plating, silver plating, painting, enamel, or bronze effects are available to meet high-end or branded needs.
Custom shapes: In addition to circles, square, oval, or special decorative shapes can be customized to enhance the design.
Tip: When customizing buttons, please provide the required diameter, shank height, and fabric type to ensure the produced buttons meet the garment design requirements.
Whether it's a shirt, jacket, or coat, choosing the right shank button size can significantly enhance the overall quality, durability, and aesthetics of your garment. With the size chart, measurement methods, material analysis, and customization strategies provided in this article, you can confidently make the perfect choice for every garment.
