Glossy black concave buttons with 2 holes for sew through fastening. These high-quality polyester buttons feature a sleek glossy finish that adds a refined touch to any garment. With a diameter of 30.5mm, they offer a balanced size ideal for coats, jackets, knitwear, and statement pieces.

Designed with a distinctive concave surface (approximately 4mm deep), these buttons provide subtle dimension and visual interest while maintaining a smooth, polished appearance. The durable polyester construction ensures long-lasting performance, making them suitable for both everyday wear and premium designs.

Perfect for designers, tailors, and crafters looking to elevate their projects with a modern, understated detail. These glossy black concave buttons are ideal for coats, jackets, blazers, suits, costumes and knitwear but suitable for all craft, sewing and knitting projects.

Available in one size only – 30.5mm (48L)

We sell a similar an almost identical button but with 4 holes

Helpful Tips

For button size, please measure the outer largest diameter from one edge of the button across to the other.  For domed buttons it is easier to measure across the back of the button.

Standard button sizes. If you’re creating a classic garment, there may be a standard size for the buttons you include. For instance, the average button size for a man’s shirt will have 13L (8mm) buttons on the collar, 16L (10mm) on the cuffs and 16L (10mm) to 20L (12.5mm) on the button placket. Men’s suits usually have a 24L (15mm) button on the jacket cuff and trouser and 32L (20mm) buttons to fasten the jacket.

Buttonhole size. As a general rule, buttonholes should be 3mm bigger than the button diameter.

Tutorial. Sewing buttons is very easy once you get the hang of it. It’s a very useful skill to possess, as buttons do fall off. We have a useful tutorial which shows shows how to sew a 2 Hole button