silicone stopper size chart
Our silicone stopper size chart is a useful tool that will help you determine the right silicone stopper size. Silicone stoppers are components that we use for a variety of applications. In the household, we can use them as container stoppers where you’d place a silicone stopper on top of a bottle to prevent liquids from escaping. Other applications include using them as stoppers for test tubes and similar glassware. Thus, we can safely say that our silicone stoppers can be used around the house and for company needs. But it’s no good using a stopper if you don’t know the right size.
To determine the right size, you can use our silicone stopper size chart. As mentioned previously, our size chart is a useful tool that helps you determine the right size. On our chart, you can see the size of the stopper, the diameter, and more. So before you buy a stopper, you need to do some measuring on your end. Figure out the correct size and compare it to our chart. That will be the correct size stopper you need to get the job done.
Our silicone stoppers are made using the finest quality materials. The unique combination of materials gives our stopper greater durability, flexibility, and longevity. Our products are better than ordinary stoppers because of these factors. In addition to that, silicone is a material that is waterproof and chemical-proof. So you can rest assured knowing that liquids won’t be able to pass through the bottle, test tube, and similar glassware.
Our website is the ideal place to give you all the resources needed to make the right purchase. If you’re still struggling to figure out the correct size, make sure to look at the before-mentioned silicone stopper size chart. We are more than eager to offer our assistance, so feel free to contact us.
Stopper & Plug Size Catalog
Compare four stopper profiles and check the selected part dimensions against your opening and available depth. Each profile has its own drawing and dimension meanings.
RST T-Shaped Plugs
Match stem diameter A, flange diameter B, stem length C and flange thickness D. E refers to the underside recess; use the selected row and approved drawing to confirm the actual profile.

RSA Tapered Corks
Compare large-end diameter A, small-end diameter B and Height, in mm. The mating bore and required seating depth determine where the taper contacts the opening.

RSB Undercut Plugs
Compare neck diameter A, flange diameter B, flange-to-lip distance C and flange thickness D. Check panel thickness and rear clearance. E refers to the underside recess.

RSD T-Shaped Stoppers
Compare stem diameter A, flange diameter B, stem length C and head thickness D, in mm. Check the seating surface and available depth as well as the hole diameter.

Need a different fit? Share the opening dimensions, mating profile and intended use for a custom size.
Discuss Your RequirementsProduct specifications
- Product form
- Removable closure fitted inside an opening
- Material
- Silicone. Specify the compound grade for the selected service.
- Application focus
- Bottle necks and test tubes. Size the part against the selected assembly.
- Dimensions to confirm
- Opening diameter, closure profile, insertion depth and exposed grip. Match these to bottle necks and test tubes.
- Size selection
- Choose the drawing or chart row by its functional dimensions and units; verify mating-part tolerances before ordering.
- Seating check
- Check the sealing contact around the opening and the force needed for insertion and removal.
Need a quote or a custom part?
Send your requirements, drawings or samples to discuss standard and custom silicone rubber parts.
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