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As of July 30th, 2021 Global Rubber Products was purchased by Niagara Rubber Supply Inc. Changes and updates to the website are coming but all customers should be aware that the location at 515 Milner Avenue in Scarborough is closed. All emails and current contact information are still intact or alternatively, you can contact Niagara Rubber Supply directly. Global Rubber has provided quality service to their customers for over 40 years and we feel becoming part of the Niagara Rubber Supply family is a great way to continue on.


Niagara Rubber Supply Inc.

94 Dunkirk Rd, Unit 12N

St.Catharines ON

L2P 3H4

905-682-7272 or 416-293-1990

Email: sales@niagararubbersupply.ca as well info@globalrubber.com will connect you with our team.

Measuring Cones, Ring Sizers & Tape Rules

Ordering your measuring tools from Global Rubber Products Ltd. is easy; simply complete our online quote and order form, or just call a friendly sales representative!

9ESPCONE 18” O-Ring Measuring Cone

9ESPCONE 18” O-Ring Measuring Cone

The step-style cone from Global Rubber Products is able to measure 184 of the most widely used ring sizes in five standard cross sections, ¼” through 5 5/8” I.D. (inside diameter). By slipping the O-Ring in to the proper slot at the bottom of the cone, you can determine the cross section. You can then determine the standard imperial size by sliding the O-Ring on to the proper step.


The 9ESPCONE O-Ring Measuring Cone measures the following sizes:

  • 011 through 050
  • 110 through 151
  • 220 through 255
  • 325 through 358
  • 425 through 455
9CONE 8” O-Ring Measuring Cone

9CONE 8” O-Ring Measuring Cone

The 8” O-Ring measuring cone from Global Rubber Products is a slip-on style cone capable of measuring 121 of the most popular sizes. Four standard cross sections measure inside diameters (I.D.), from ¼” through 3”. To determine the cross sections, simply slip the O-Ring in to the proper slot at the bottom of the cone. Then, slide the O-Ring on to the correct line to determine its standard imperial size. This cone also comes with a diameter measuring tape to measure O-Ring inside diameters of 3 ¼” through 8”, in five standard cross sections.

O-Ring sizes measured:

  • 001 through 041
  • 110 through 151
  • 210 through 234
  • 325 through 337

Tape sizes measured:

  • 042 through 050
  • 152 through 171
  • 235 through 266
  • 338 through 369
  • 425 through 445
9MGAUGE O-Ring Sizer

9MGAUGE O-Ring Sizer

The O-Ring sizer from Global Rubber Products works similarly to a v-belt measuring tool. This equipment makes it easy to find the correct thickness. And, to determine the O-Ring’s size, simply place it around the appropriate semi-circle knobs and expand the unit. The correct ring size will then be displayed in the related window. by placing the O-Ring around the correct semi-circle knobs.


9MGAUGE O-Ring Sizer measures O-Rings sized:

  • 001 through 050
  • 102 through 165
  • 201 through 279
  • 309 through 382
  • 435 through 455
Tape Rule for O-Ring Sizing

Tape Rule for O-Ring Sizing

We offer two sizes of tape rules, each with a side to measure metric and imperial O-Rings.


Tape #1: is 25.5 inches (648mm) long and measures inside diameters (I.D.) of 2.5 inches (65mm) through 8 inches (205). Tape #1 measures imperial O-Ring sizes ranging from:

  • 037 through 050
  • 144 through 171
  • 230 through 266
  • 333 through 369
  • 425 through 445


Tape #2: is 51 inches (1296mm) long and measures inside diameters (I.D.) of 2.5 inches (65mm) through 16 inches (410mm). Tape #2 measures imperial O-Ring sizes ranging from:

  • 037 through 050
  • 144 through 178
  • 230 through 282
  • 333 through 385
  • 425 through 461
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