Prym's sew-on counter buttons are especially suitable for coats, jackets, and pockets under exceptional load and for strong materials. These 11 mm, large and square buttons made of transparent polyester are sewn under the button for more robust support. They therefore function as a spacer between the fabric and button, making it easier to open and close and preserving the thread. The four holes make them suitable for two and four-hole buttons, and they are practically invisible. The packaging contains twenty sew-on counter buttons. They can be washed at up to 60 degrees.