I saw you ask the same thing on the other auction.. So, can I help you out? 11/16" means that it's 11 parts of 1 inch. So if my auction says that they're 1 inch, and you're asking for 11 parts of that, it definitely won't fit. Here's also another helpful hint; 11/16" converted into millimeters is 18mm, 1inch is 25mm. Doesn't sound like much but, trust me, it is! Most people (or at least I do) will put how many millimeters the size is (the exception being even inches) Does that help? I hope you find plugs that you're looking for! ^_^