These beautiful reusable metal straws are perfectly sized for Half Pint (8oz) Mason jars! They work best for cocktails, juice, iced tea, coffee, water, soda, etc. You can also use them in milk cartons and juice boxes too! If you buy a single straw, we recommend buying a thin straw cleaner too, but they are also dishwasher safe. Our 6.25″ long, 6mm outside diameter (5mm inside diameter) straws have a 45° bend for drinking comfort (and bonus style points!). The engraved threading gives them that nostalgic plastic bendy straw look, but they do not bend. They are the perfect height for a half pint (8oz) jar. These high quality straws are made of 18/8 304 grade stainless steel. Perfect for adults and kids!