Awesome 10-pack of 304 stainless-steel metal straws plus two cleaning brushes = 12 total pieces!  These measure 8.46 inch (approximately 21.5cm) and are compatible with glasses up to 20 ounces.  Best of all, you get straight and curved straws!  If you're using these with Mason Jars, be sure to check out our assortment of lids, while supplies last!