Laboratory Rubber Stopper Approximate Dimensions
Stopper # Top Dimension Bottom Dimension
#000 13mm 8mm
#00 15mm 10mm
#0 17mm 13mm
#1 19mm 14mm
#2 20mm 16mm
#3 24mm 18mm
#4 26mm 20mm
#5 27mm 23mm
#6 32mm 26mm
#7 37mm 30mm
#8 41mm 33mm
#9 45mm 37mm
#10 50mm 42mm
#11 56mm 48mm
#12 64mm 54mm
#13 68mm 58mm
#14 90mm 75mm
#15 100mm 81mm
http://www.101science.com/Rubberstopper.htm (http://www.101science.com/Rubberstopper.htm)