Four-hole Button

Definition and Overview

A four-hole button is a standard button with four holes in the button body. Because sewing thread is passed through the holes to secure it to textile, it generally does not have a back shank like a shank button. With four holes, it is easier to run the thread in multiple directions and keep it stable than with a two-hole button.

The way the thread is seen running across the surface can be made into designs such as parallel, cross, or bird-foot styles. It is a term for a button shape and does not limit the material, so it is made from a wide variety of materials, including shell, real buffalo horn, nut, polyester resin, urea resin, and metal.

Materials and Structure

The holes are usually round, but there are also recessed holes designed to keep the thread in place, and versions with decorative detailing around the holes. The hole diameter, the spacing between holes, and the thickness of the hole edge are factors related to the thread thickness used, the sewing method, and the fastening strength.

The nearly flat shape blends easily with the garment body, but if attached directly to thick fabric, it may become difficult to fasten and unfasten because of the buttonhole thickness. In that case, a thread shank is created under the button with a wrap shank to leave an appropriate gap between the button and the textile.

• Shell, real buffalo horn, and nut: because these are natural materials, individual differences may occur in color, pattern, thickness, and so on.
• Polyester resin and urea resin: there are many options for color and shape, and they are widely used for apparel.
• Metal and glass: these are hard and decorative, but care is needed regarding weight, chipping, and impact.

Size Notation

Button size is shown in mm by diameter, and is also expressed in lignes. Lignes are a traditional sizing unit for buttons, and listing them together with the mm notation in specification sheets, accessory tables, and orders helps reduce misunderstandings.

When selecting a button, check not only the diameter but also the thickness, hole diameter, buttonhole length, and the thickness of the textile to be used. Buttonholes should be set according to the button diameter and thickness, and it is important to test fastening and unfastening with the actual item before mass production.

Main Applications

Four-hole buttons are used for shirts, blouses, cardigans, jackets, coats, pants, skirts, dresses, and more. For lightweight apparel, relatively small and light buttons are chosen, while for jackets and outerwear, buttons with a thickness and presence that match the fabric thickness and design are selected.

They are used not only for front openings, but also for cuffs, pockets, collars, waist adjustment sections, and more. Depending on the application, in addition to decoration, durability for repeated opening and closing, washing method, and compatibility with the buttonhole are checked.

How to Attach and Handling Notes

When attaching buttons, use the four holes evenly and keep the thread path and tightness consistent. If the textile is thin or if strong force is applied to the area, using a backing button on the reverse side can help distribute the load. For thick fabric, use a wrap shank to create space under the button so it passes through the buttonhole without strain.

Resistance to washing, dry cleaning, and ironing varies depending on the button material and surface finish. In addition to the care label, confirm the test conditions for the button as an accessory. Direct contact with a hot iron, strong impact, and the effects of bleach or solvents may cause deformation, cracking, discoloration, or changes in gloss.

Frequently Asked Questions

How is a four-hole button different from a two-hole button?

The main difference is the number of thread-through holes. A four-hole button allows thread paths such as parallel or cross patterns and is characterized by being easier to secure from multiple directions. A two-hole button tends to look cleaner and is also used for lightweight apparel and smaller sizes. Both are selected according to the material, application, and fabric thickness.

What kind of thread is used to attach a four-hole button?

In general, button thread or hole thread is used, and the thickness and material are selected according to the button hole diameter, fabric thickness, and required strength. If the thread is too thick for the hole, it may be difficult to pass through; if it is too thin, it may wear more easily. Before mass production, check the fastening strength and appearance with sewing samples.

Can a four-hole button be pressed directly with an iron?

Because heat resistance differs by material, direct high-temperature pressing should generally be avoided. In particular, resin buttons, shell buttons, and buttons with surface finishes may deform, discolor, or change in sheen due to heat. Use a pressing cloth and confirm temperature, pressure, and time under conditions suitable for both the button and the textile.