Serving the Beverage Industry Since 1996 Commercial Beverage Equipment & Dispensing Parts Breweries • Wineries • Soda Systems • Coffee Service • Vending Equipment
30+ Years ExperienceNationwide ShippingTechnical Support
530-622-8265

Manufacturers

Rubber Stopper Size Guide & Airlock Fit Chart | The CHI Company

STOPPERS & AIRLOCKS

Rubber Stopper Size Chart

Rubber stoppers with a center hole sized for airlocks and similar fittings. Use the chart below as a guide, and measure older carboys, jugs, or bottles before ordering.

Sizing Guide

Rubber stoppers with a hole drilled in the center, perfectly sized to accept airlocks or what have you. All suggested "Best Fits" are approximates. If you've got an older carboy, jug or bottle, be sure to measure the mouth and use the dimensions provided.

Stopper Dimensions

Stopper Sizee Best Fit Top Diameter in. Bottom Diameter in.
2 Beer Bottle 13/16 5/8
3   9/10 3/4
5.5   1-1/8 3-1/32
6   1-1/8 1-1/16
6.5 6 gal. Carboy 1-3/8 1-1/8
7   1-7/16 1-3/16
7.5   1-1/2 1-1/4
8   1-5/8 1-3/8
8.5   1-11/16 1-7/16
9.5   1-13/16 1-1/2
10 Better Bottles 1-15/6 1-5/8
10.5   2-1/16 1-3/4
11 15 gal. Demijohn 2-1/4 1-15/16
11.5   2-15/32 1-31/32
12   1-1/8 2-1/2
13   2-11/16 2-5/16
Copyright © 2026 The CHI Company. Maintained by Host 99 Web Hosting