Common Burr Sizes
Sweet Spot Size
Grind Speed Range
Price Range
Understanding Grinder Size
Grinder size refers to the diameter of the grinding burrs. Larger burrs grind faster, more consistently, and with less heat retention. However, they're also more expensive and require more space. The right size depends on your specific needs and setup. Investing in a quality grinder is more important than the espresso machine itself.
For most home users, a 40mm grinder provides the perfect balance of performance and value. Serious enthusiasts may prefer 50mm burrs for better consistency, while commercial setups require 58mm or larger. Consider your machine type and daily usage when choosing.
✓ Size Matters Because:
- • Larger burrs = faster grinding
- • Better consistency with size
- • Less heat retention
- • Higher cost for larger sizes
- • More space required
Quick Answer
For home espresso, 40mm burrs are ideal for most users. 58mm burrs offer better consistency but require more space and budget. Choose based on your machine type, available space, and daily usage needs.
Common Burr Sizes Explained
38mm Burrs
Compact size for space-constrained setups
- Best for: Travel, tiny kitchens, Nespresso users
- Speed: 1-2 grams per second
- Consistency: Good for pressurized baskets
- Price: $100-200 range
- Popular models: Baratza Sette 30, Rancilio Rocky
40mm Burrs
Sweet spot for home espresso enthusiasts
- Best for: Most home users, semi-automatic machines
- Speed: 2-3 grams per second
- Consistency: Excellent for non-pressurized baskets
- Price: $200-400 range
- Popular models: Baratza Encore, Fellow Ode
50mm Burrs
Prosumer grade for serious enthusiasts
- Best for: Multiple daily shots, light commercial
- Speed: 3-4 grams per second
- Consistency: Commercial-level uniformity
- Price: $400-800 range
- Popular models: Eureka Mignon, Fiorenzato F4
58mm Burrs
Commercial size for maximum performance
- Best for: High-volume, commercial cafes
- Speed: 4-6+ grams per second
- Consistency: Professional grade precision
- Price: $800-2000+ range
- Popular models: Mazzer Mini, Mahlkönig Vario
Matching Grinder to Machine
Machine Types & Recommended Sizes:
- Entry-level machines: 38-40mm sufficient
- Semi-automatic: 40mm minimum, 50mm ideal
- Prosumer machines: 50mm recommended
- Double boiler: 50-58mm for full potential
- Commercial machines: 58mm or larger
Consider Your Setup:
- Counter space: Measure depth and height
- Power requirements: Larger grinders need more power
- Noise tolerance: Bigger grinders often louder
- Budget allocation: Spend more on grinder than machine
Daily Usage Guide
1-2 Shots Daily
38-40mm burrs perfect. Speed not critical, consistency matters more.
3-6 Shots Daily
40-50mm burrs ideal. Balance of speed and consistency for regular use.
7-12 Shots Daily
50-58mm burrs recommended. Speed becomes important for efficiency.
13+ Shots Daily
58mm+ burrs essential. Commercial-level performance needed.
Budget vs. Size Trade-offs
Smart Budget Allocation:
- Spend more on grinder than machine initially
- 40mm quality beats 58mm budget model
- Consider used commercial grinders
- Factor in cost of replacement burrs
- Remember: grinder lasts longer than machine
Size Comparison Chart
| Size | Best For | Price Range | Grind Speed | Footprint |
|---|---|---|---|---|
| 38mm | Beginners, space-saving | $100-200 | 1-2g/s | Very compact |
| 40mm | Most home users | $200-400 | 2-3g/s | Compact |
| 50mm | Enthusiasts, heavy use | $400-800 | 3-4g/s | Medium |
| 58mm | Commercial, prosumer | $800-2000+ | 4-6g/s+ | Large |