Available in a rainbow of colors. This is the size I use for most of my kumihimo projects such as the one above. The manufacturers calls it 2mm.

 

Since it is difficult to perfectly capture a color on a computer screen I recommend asking for a small sample if matching is critical for your project. Up to three of these can be included in your order, free of charge. Additional ones would be .25 each.

 

Click on an image for more information.