Quick answer: Mason jar lids are usually sold in two standard sizes: regular mouth and wide mouth. A regular-mouth Ball lid measures about 2.75 inches across; a wide-mouth lid is about 3.5 inches across. Measure the outside edge of your jar opening before ordering, because repurposed food jars can look similar without using standard mason-jar threads.
Already measured a wide-mouth jar? View the ANOTION bamboo drinking-lid set. It includes lids, reusable straws, and a cleaning brush; jars are not included.
Regular Mouth vs Wide Mouth Mason Jar Lids: How to Measure Before You Buy
The difference looks obvious when two jars are sitting side by side. It is much less obvious when you are holding one jar in the kitchen and trying to order a replacement lid from your phone.
The fastest way to avoid a return is to measure first. It takes less than a minute, and it matters more than the jar capacity printed on the glass.
What are the two standard mason jar lid sizes?
| Jar opening | Approximate lid diameter | Common description |
|---|---|---|
| Regular mouth | 2.75 in / about 70 mm | Narrower shoulder and opening |
| Wide mouth | 3.5 in / about 86-89 mm | Wider opening with straighter sides near the top |
Ball lists its regular-mouth replacement lids at 2.75 inches across and identifies its wide-mouth closures as compatible with Ball wide-mouth glass mason jars. That standard sizing is why one wide-mouth lid can often move between several wide-mouth jar capacities. The capacity can change while the mouth stays the same.
How do I measure a mason jar lid?
Measurement view: regular-mouth and wide-mouth openings keep an approximately 70-to-86 mm size relationship; measure the widest outside edge before ordering.
- Remove the current lid and wipe the jar rim dry.
- Place a ruler across the widest outside edge of the threaded opening.
- Measure straight through the center, not along the curve.
- Compare the result with 2.75 inches for regular mouth or roughly 3.5 inches for wide mouth.
If your measurement falls between the two, stop before ordering. The jar may use a proprietary or commercial-food thread rather than a standard mason-jar closure.
Are all wide-mouth mason jar lids interchangeable?
Standard wide-mouth Ball jars share a common closure size, and many Kerr-style wide-mouth jars follow the same format. That does not mean every jar described as “mason style” will fit.
Decorative jars, imported drink jars, pasta-sauce jars, pickle jars, and some store-brand food jars can have different thread patterns. Reddit threads about replacement lids are full of the same frustrating story: the diameter looked right, but the threads did not catch or the lid sat too loosely. The useful lesson is simple: match both the diameter and the jar type.
Does jar capacity determine lid size?
No. A 16 oz and a 32 oz jar can both use a wide-mouth lid. Capacity tells you how much the jar holds; it does not tell you the closure size. Look for “wide mouth” or “regular mouth” on the original packaging, or measure the opening.
Can I use a drinking lid for canning?
No. A bamboo straw lid is an everyday drinking accessory. It is not a canning lid and should not be used for water-bath canning, pressure canning, or heat processing. Use closures specifically made and tested for preserving when you can food.
A simple replacement for jars you already own
If you have standard wide-mouth Ball or Kerr-style jars in the cabinet, a drinking lid can turn one into an iced-coffee or water cup without adding another glass to the shelf. The ANOTION wide-mouth bamboo lid set includes two bamboo lids, two stainless steel straws, and a cleaning brush. The jars are not included, so measure before ordering.
For complete cups rather than replacement parts, browse our Bamboo Mason jar cups.
Frequently asked questions
How do I know if my Ball jar is wide mouth?
Measure across the outside of the threaded opening. A wide-mouth closure is roughly 3.5 inches across, while a regular-mouth closure is about 2.75 inches.
Will a wide-mouth lid fit every Ball jar?
It should fit standard Ball jars identified as wide mouth. It will not fit regular-mouth jars, and unusual decorative or commercial jars may use a different closure.
Will this fit a pasta sauce or pickle jar?
Not necessarily. Many commercial food jars use different threads even when the opening looks close to a mason-jar size.
Is a bamboo straw lid leakproof?
A straw opening prevents a drinking lid from being fully sealed. Keep the jar upright and do not place it loose in a bag.
Sources: Ball Mason Jars compatibility and product specifications for regular- and wide-mouth closures. Last updated August 8, 2026.
ANOTION | Bamboo Mason
Measured for wide-mouth jars
Already have standard wide-mouth Ball or Kerr-style jars? Add two bamboo drinking lids, two stainless steel straws, and a cleaning brush. Measure first; jars are not included.