Coffee Grinder Burr Size Guide: 64mm vs 80mm vs 83mm vs 98mm vs 102mm vs 120mm
Burr size is one of the first specifications people notice when comparing coffee grinders. But 64mm, 80mm, 83mm, 98mm, 102mm, and 120mm do not form a simple ladder from “good” to “better.” Each size belongs to a different grinder platform, burr geometry, and workflow.
Quick Answer: Choose burr size based on how you brew, the burr geometry you want, your preferred cup profile, and your workflow. 64–80mm grinders can be excellent for home espresso. 83mm conical burrs offer a different flavor and feeding style. 98mm and larger platforms give enthusiasts more large-burr options, while 120mm grinders are aimed at users who value a very large burr platform and higher-throughput workflows. Bigger is not automatically better.
What Does Burr Size Actually Change?
Burr diameter can affect grinding speed, available burr designs, motor requirements, heat behavior, and the physical size of the grinder. It may also change how beans are fed through the burrs.
However, burr geometry matters at least as much as diameter. Two grinders with the same burr size can taste very different if the burr teeth, cutting pattern, RPM, alignment, or chamber design are different.
64mm Burr Grinders
64mm flat burrs are popular because the platform is compact and widely supported. They can work very well for home espresso and filter coffee, depending on the installed burr set.
A 64mm grinder makes sense if you want a smaller footprint, broad aftermarket burr choice, and do not need the workflow of a much larger commercial-style platform.
80mm Burr Grinders
80mm flat burrs move into a larger format while still being practical for many home and prosumer setups. The extra diameter can support different cutting geometries and a faster-feeling workflow, but the exact result depends on the grinder.
If you are comparing these two sizes directly, see our 64mm vs 80mm burr grinder guide.
The YEH-80L is YARRAMATE's 80mm flat-burr single-dose platform.
83mm Conical Burr Grinders
83mm often appears in large conical-burr grinders. Conical burrs should not be judged only by diameter because their geometry and bean-feeding path differ from flat burrs.
For espresso, many users choose a large conical platform for body, texture, and a more traditional flavor style. Others prefer flat burrs for more separation. Neither approach is universally better.
The YEH-83C uses an 83mm conical-burr platform.
98mm Burr Grinders
98mm flat burrs are common in high-end enthusiast and commercial-style grinders. The format gives users access to large burr designs intended for different flavor goals, including espresso and filter-focused profiles.
For home users, the real question is not “Is 98mm better?” but “Will I benefit from the burr options, workflow, and footprint?” If you mainly brew one traditional espresso each morning, a smaller grinder may already do everything you need.
See 80mm vs 98mm burr grinder and Is a 98mm Grinder Worth It?
The YEH-98L is YARRAMATE's 98mm flat-burr single-dose grinder.
102mm Burr Grinders
102mm is a more specialized size. Moving from 98mm to 102mm is not automatically a flavor upgrade. Compatibility, burr carrier design, available burr sets, and the grinder's mounting system all matter.
If you are evaluating this step, read our 98mm vs 102mm coffee grinder burrs guide.
120mm Burr Grinders
120mm burrs belong to a very large grinder platform. They may appeal to users who want a large cutting surface, different burr options, or a higher-throughput workflow. The tradeoffs can include a larger machine, higher cost, and a platform that may be unnecessary for a typical home espresso routine.
The YEH-120L is YARRAMATE's 120mm professional single-dose platform.
Burr Size Comparison
| Size | Typical Platform | Best Fit | Main Question to Ask |
|---|---|---|---|
| 64mm | Flat burr | Home espresso and filter | Do I want a compact grinder with broad burr choice? |
| 80mm | Flat burr | Prosumer home use | Do I want a larger flat-burr platform without moving to 98mm? |
| 83mm | Often conical | Espresso users seeking body and texture | Do I prefer a large conical workflow? |
| 98mm | Large flat burr | Enthusiast espresso and filter | Will I use the burr ecosystem and large platform? |
| 102mm | Specialized flat burr | Specific compatible platforms | Does my grinder and carrier support the burr I want? |
| 120mm | Very large flat burr | Advanced or higher-throughput use | Do I actually need this scale of grinder? |
Does a Bigger Burr Make Better Coffee?
No. Burr size alone cannot predict cup quality. A larger burr may provide a different geometry or workflow, but alignment, tooth design, RPM, bean feeding, retention, and your brewing recipe also shape the result.
A well-designed 64mm or 80mm grinder can outperform a poorly matched larger grinder for your specific coffee.
Which Burr Size Is Best for Espresso?
For most home espresso users, 64mm to 80mm can provide plenty of performance. If you enjoy comparing burr profiles, light-roast espresso, or large flat-burr platforms, 98mm may be attractive. If you prefer a large conical profile, 83mm is a different route rather than a direct step up or down.
Which Burr Size Is Best for Pour-Over?
For pour-over, particle distribution and fines control matter more than diameter by itself. Choose a burr set designed for clarity and filter use rather than assuming the largest burr will produce the cleanest cup.
Frequently Asked Questions
Is 80mm better than 64mm?
Not automatically. The 80mm platform is larger, but the burr geometry and grinder design determine whether it better fits your coffee and workflow.
Is 98mm worth it for home espresso?
It can be if you want access to large-burr options and enjoy experimenting with cup profiles. Many home users do not need 98mm to make excellent espresso.
Are 83mm conical burrs comparable to 80mm flat burrs?
They can be compared as grinder choices, but not by diameter alone because conical and flat burrs use different geometries.
Do larger burrs create less heat?
Burr size can influence thermal behavior, but motor speed, workload, burr design, and grinder construction also matter.
What burr size should a beginner choose?
Start with workflow, budget, brew method, and adjustment quality. A smaller well-designed grinder is often easier to justify than buying the largest burr size available.
Final Thoughts
Use burr size as one part of the decision, not the whole decision. Compare geometry, alignment, RPM, retention, grind adjustment, and the coffees you actually brew. The best grinder is the platform that matches your workflow and flavor goals, whether that is 64mm, 80mm, 83mm, 98mm, 102mm, or 120mm.
Browse the full YARRAMATE coffee grinder collection.