Suitable for regular mouth Mason jar: such as jars in 60 mm inner diameter and 70 mm outer diameter, height 130 mm; Note: the lid hole diameter is 10 mm, and the silicone rings diameter is 8 mm, so a straw less than 6 mm is suitable for these lidsQuality material: made of metal, reusable and durable, rust-proof and leak-proof, dishwasher safe and unbreakableUtility: fit for toddlers (less spills), kids and adults as the straws are a proper length for 8 oz to 16 oz regular mouth Mason jars, suitable size for those thicker shakes but not too wide for little mouthsWidely use: it can be applied to drink, like coffee, tea, juice, also can be applied as a storage lidExtensive usage: it is suitable for parties, craft projects, diy candles, to make soap pumps, torches and much more, the lid is compatible with ball and wide Mason jar, a friction zone is designed to ensure non-slipperyColour:SilverMaterial:metalSize:Diameter: 70mmPackage Contents:20* Mason Jar LidsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.