We carry all sizes of stoppers for your many bottle needs. All stoppers come with a 5mm hole to fit standard 5/16" tubes. Other stopper and hole sizes are available upon request. 

#3 - measures 19mm in diameter on the bottom, 25mm on top                                       #6 - measures 25mm in diameter on the bottom, 32mm on top
#7 - measures 31mm in diameter on the bottom, 37mm on top
#8 - measures 34mm in diameter on the bottom, 40mm on top