These 6 inch cocktail straw sturdi sips are approximately 3/16" in diameter. 20 inners of 500 straws packaged in a corrugated case. 5 packs each of blue, red, yellow, green. Using colour straws is helpful in foodservice to distinguish, for example, cola vs. diet cola, or to match décor. Expense of colour not an issue when using considerable stock of the product.