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Rubber Stopper Sizing Reference Chart

Rubber Stopper Sizing Reference Chart

Stopper Size
Bottom Diameter (Inches)
Top Diameter (Inches)
Avg. Diameter (Inches)
#2
5/8
3/4
11/16
#3
11/16
7/8
13/16
#5.5
15/16
1-1/16
1
#6
7/8
1-1/4
1-1/8
#6.5
1
1-1/2
1-1/4
#7
1-3/16
1-7/16
1-5/16
#7.5
1-1/4
1-1/2
1-3/8
#8
1-5/16
1-9/16
1-7/16
#8.5
1-7/16
1-11/16
1-9/16
#9.5
1-1/2
1-3/4
1-5/8
#10
1-11/16
1-15/16
1-13/16
#10.5
1-13/16
2-1/16
1-15/16
#11
1-15/16
2-3/16
2-1/16
#11.5
2
2-1/2
2-1/4

Source: Rubber Stopper Sizing Reference Chart