What is the thickness of this gasket?

This is a guesstimate as. I don't have access to them right now but I would say about 2 mm thick. You will notice a slight difference when closing the lid when using these gaskets. I'd say they are very useful and seal very well. I know I will be buying more.

what are the actual dimentions of the outer and inner ring?

The actual dimensions are: Inside Diameter - 2.00" Outside Diameter - 2.75" Thickness - 0.0625" (1/16")

It says they are 'regular' at 2.75" diameter, but a regular Mason jar's mouth measures 2-5/8" How do they fit regular jars?

They fit in the white twist-on lids. When screwed down on top of the jar, the mouth of the jar hits the centerline of the ring perfectly.

I have wood lids for canisters that need new gaskets. The measurement is good but will they fit into the groove of the wooden lid?

I use them on metal lids. The gasket is 3/8" wide & 1/16" thick. I hope this will help.

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12 Silicone Gasket Sealing Rings For Mason Jar/Ball Plastic Storage Cap, Reusable Food-Grade Airtight Rubber Seal For Caning Jar Plastic Lids (12 REGULAR MOUTH)

Product ID: 33524378

Details

Brand
RPI Jar Rings
Color
Clear
Material
Plastic Rubber
Shape
Round
Style
Canning Jar

♻️BPA-free, food-grade silicone

❄️Freezer & microwave safe

🛡️12 reusable silicone sealing rings

R429

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Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔒 Lock in freshness, unlock your kitchen’s potential!

SAFE CHEMICAL FREE - Made from BPA-free, food-grade silicone that won’t leach harmful chemicals into your food.
LEAK PROOF CONFIDENCE - Secure gasket ensures no spills or leaks, keeping your homemade creations fresh and mess-free.
VERSATILE KITCHEN ESSENTIAL - Ideal for fermenting kimchi, kombucha, and canning—plus fits popular blender brands like Hamilton Beach.
DURABILITY MEETS CONVENIENCE - Dishwasher safe and reusable design means less waste and more time saved.
SEAL IN FRESHNESS EVERY TIME - Perfectly sized 2" inner diameter fits all regular mouth mason jar lids for airtight preservation.

This set of 12 BPA-free, food-grade silicone sealing rings fits all regular mouth mason jar plastic lids, providing an airtight, leak-proof seal ideal for canning, fermenting, and food storage. Dishwasher, freezer, and microwave safe, these reusable gaskets combine safety, durability, and versatility to elevate your kitchen routine.

Specifications

ASIN	B01IUHSBL4
Best Sellers Rank	#1,480,746 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #4,309 in Canning Lids
Brand Name	RPI Jar Rings
Color	Clear
Customer Reviews	4.2 4.2 out of 5 stars (72)
Material Type	Plastic, Rubber, Silicone
Number of Pieces	12
Product Style	Canning,Microwave,Jar
Shape	Round
UPC	732773797879
Unit Count	12 Count

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R429

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered 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 South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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The product quality is outstanding. Exactly what I needed for my work.

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