The corks are as described in demensions, however, quality is inconsistent. Most corks are graded and these are not. I recommend getting extras so that you won’t have to use the bad ones. I’m using these in double magnum bottles of wine so it’s important that they seal completely. Of the 10 that I ordered, 3 or 4 are not usable (their quality grade is low and they won’t seal properly), so buy extras.