Ribbing is used for cuffs and collars. This particular ribbing is extremely durable. The pack consists of 8 strips in a range of colors which includes a strip of Black as well as White. The styles may vary from color to color, some are heavier than others and there may be a variety of widths. Each strip is 7" wide and the width varies from 21" tubular (its knit in a circle) to 28" tubular. The pack is an extremely good value, as the individual strips sell for $6 each, so the value of the pack is $48. An incredible value at the sale price of the pack of just $18.50 MIDWEIGHT Rugged Rib Strip 28" tubularAbout 17.2 oz/LINEAR yard (note wider fabric than heavy weight rugged rib)HEAVY WEIGHT Rugged Rib Strip 21" tubularAbout 16 oz/LINEAR yardBOTH WEIGHTSFast DryingGreat Shape RetentionNOTE: Heavyweight White has dirt marks throughout the roll and you may or may not get a strip with marks. They should wash out in any event. Currently the pack consists of: Black heavier weight Blue Water medium weight and Blue Water heavier weight Burgundy medium weight Purple heavier weight Red heavier weight Royal heavier weight White heavier weight.