What is the Difference Between #8 and #9 Corks
A question we get a lot at the store is, what is the difference between a #8 and a #9 wine cork?
A #8 cork is 22mm in diameter and a #9 cork is 24mm in diameter. The benefit of a #9 cork is it will seal tighter and is for long term storage of the wine. (More than 2 years)
We do not recommend using #9 corks if you are using a hand corker. You should definitely have a floor corker to use #9 corks.
#8 corks are recommended if you are using a hand corker or wing corker and if you plan to store the wine less than 2 years.