Standard O-Ring Size Charts
O-Rings are available in various standard sizes. Refer to our o-ring sizing charts below for the most commonly used sizes around the world.
We also offer custom o-rings without tooling fees to ensure a perfect fit. Once you find the right size order o-rings online from our world's largest inventory network or contact us for responsive expert service.
As one of the largest suppliers of custom and standard sealing solutions, our team will help you find the right seal for your application. Whether you're looking for a high temperature seal or one that resists even the harshest of chemicals, our inventory network of more than one billion seals - including 300,000 unique items - guarantees that we'll either find the seal you need ready to ship or will customize a product to make your application a success. We look forward to working with you. Explore our size charts below, and remember we're here to support you.
O-Ring Standard Sizing Charts
Square Standard Sizing Charts
X-Ring Standard Sizing Charts
O-Ring Size List Information
O-rings are the most commonly used and widely available rubber sealing rings in the market. Various nations and organizations have developed o-ring sizing standards that are now used worldwide. Popular o-ring size standards include USA's AS568 o-ring size chart, the UK's BS 1806 o-ring sizing chart, and Japan's JIS B 2401 o-ring size list. Metric o-rings and custom size o-rings are often used when a standard o-ring size will not fit an application or existing hardware. Marco Rubber offers custom o-rings and non-standard o-rings in most materials with no tooling fees or setup fees. If you don't see the size you need listed in a standard or metric o-ring size chart then please contact us or request a quote.
X-Ring and Square-Ring Size List Information
X-rings and Square Rings are widely available in standard USA AS-568 sizes. Tooling for metric x-rings, metric Quad-Ring® Seals, and metric Square Rings is less common than metric o-ring tooling. Marco Rubber offers custom x-rings, custom square rings, non-standard x-rings, and non-standard square rings in most materials with no tooling fees or setup fees. If you don't see the size you need listed in a standard x-ring size chart or standard square ring size chart then please contact us or request a quote.
