Using the silhouette printed on the side of the gauge to identify smaller o-rings, do I use the outer or inner silhouette?

Nicholas, your o-ring should completely cover the white part of the silhouette. This is a bit tricky to do by eye. There's more to sizing an o-ring than comparing it to the silhouette. The Busy Corner o-ring gauge you're referencing is made for US sized o-rings. There are also metric, Japanese and British sizes. The only way to be sure of an o-ring's size is to measure the ID, OD and cross section with a caliper. For US o-rings, the numbers printed next to each silhouette on the gauge are called "dash" numbers. O-rings made to AS-568 specifications, no matter who the manufacturer is, will be the same size. So a -105 (dash 105) o-ring will have an inside diameter of .143, an outside diameter of .349 and a cross-section of .103. The first digit of a dash number tells you the cross section in decimal inches. 0 is .070, 1 is .103, 2 is .139, 3 is .210 and 4 is .275. Charts for US, metric, Japanese and British sizes are available on the internet. I likely gave you more info than you requested, but thought it may be of help to others.

does it measure in metric?

No,this oring gauge measure in Imperial(Inch) sizes.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

O-Ring Sizing Gauge Slide Style National Type TELESCOPING O-Ring Gauge (Blue)

O-Ring Sizing Gauge Slide Style National Type TELESCOPING O-Ring Gauge (Blue)

Product ID: 436393252

Details

Brand
BUSY-CORNER
Colour
Blue
Material
Plastic
Nominal outside diameter
13 Inches
UPC
722794896965

👜Compact & portable design

📏Precise AS568 sizing

🔵Durable high-quality plastic

KD 20.90

Duties & taxes included

In stock

Sold byAmazon KUWAITDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to KUWAIT.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Description

🔧 Measure Like a Pro, Carry Like a Boss!

TRUSTED QUALITY - Crafted from premium plastic for durability and long-lasting performance.
COMPACT POWERHOUSE - Sleek, lightweight design fits perfectly in your toolkit or pocket for on-the-go use.
EFFORTLESS OPERATION - Slide-style gauge lets you size O-rings quickly without stretching or guesswork.
CUSTOMER CENTRIC SUPPORT - Backed by BUSY-CORNER’s commitment to quality and responsive service.
PRECISION AT YOUR FINGERTIPS - Easily measure inner, outer diameters & thickness with AS568/BS106 accuracy.

The O-Ring Sizing Gauge Slide Style by BUSY-CORNER is a compact, durable plastic tool designed for precise measurement of O-rings according to AS568 and BS106 standards. Its slide-out mechanism ensures accurate sizing without stretching, making it an essential, portable tool for professionals needing quick, reliable O-ring measurements.

Specifications

ASIN	B08BHR6GG8
Best Sellers Rank	128,872 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 5 in Ring Gauges
Brand	BUSY-CORNER
Colour	Blue
Customer Reviews	4.6 out of 5 stars 131 Reviews
Manufacturer	Delson Rubber & Hardware Tools PTE.LTD
Manufacturer Part Number	o ring gauge blue
Material	Plastic
Model Number	o ring gauge blue
Nominal Outside Diameter	13 Inches
Nominal outside diameter	13 Inches
Number of Items	1
Number of Pieces	1
Set Name	O-Ring Set
UPC	722794896965
Unit Count	1.0 count

Reviews

R**4

Works as expected

Bought for work, seems to work fine, hasn’t been used in anger. Bigger than expected

28.05.2026

A**R

This tool is great!

This tool is awesome. I never leave reviews but this little gadget is impressive and accurate. I have a hydraulic repair shop and decided to overhaul my oring storage system. I have thousands of o-rings and this tool was invaluable during this process. There is a bit of a learning curve with the amount of tension you put on the oring when reading the size . This handy little tool can read any oring on the dash system from -001- 475. Overall, if you deal with o-rings in any capacity buy it!

12.06.2026

M**E

muy util

espectacular

16.06.2026

J**K

O ring gauge

Great gauge for finding o ring size. Fits in a tool box or bag. Easy to use.

29.12.2025

F**L

Inaccurate

The gauge read two sizes smaller. The size for a 025 o' ring is shown on the chart as ID 29.87 mm . The vernier caliper measured ID as 33 mm which is for a 027 o' ring. O well, I guess I will have to estimate it up or I might consider returning the tool

8.11.2022

J**E

Works as intended.

Measures o rings nicely just don't stretch the o ring to far or you will get a misreading.

3.03.2025

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.