- Top Pick: Normcore 54mm Bottomless Portafilter, Naked Portafilter Fits Breville Sage Barista Express Machines, 18g Filter Basket Included
- Best Value: 54 mm Bottomless Portafilter Compatible with Breville Barista BES870XL
- Premium Choice: 54mm Bottomless Portafilter fit Breville Barista Express Machines BES870XL
Last updated: September 18, 2026
Choosing the right portafilter is less about the handle’s appearance and more about exact compatibility. A portafilter that looks nearly identical may have a different basket diameter, locking-tab position, ear thickness, or group-head fit. Even a 1 mm difference can prevent it from locking in securely or cause leaks during brewing.
The most common home espresso portafilter sizes are 51 mm, 54 mm, and 58 mm, but several less-common sizes are also in use. Before buying, identify your espresso machine’s brand and model, then confirm whether the replacement includes a basket. A “54 mm portafilter,” for example, may be sold with an 18-gram basket, while another 54 mm model may use a different rim or tab design.
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The Short Answer
Most Breville and Sage Barista Express machines, including the BES870XL, use a 54 mm portafilter. The example 54 mm bottomless portafilters listed for the Barista Express are designed around this size, with some versions including an 18-gram filter basket. Typical prices for compatible 54 mm Barista Express portafilters range from about $26 to $69, depending on the handle material, basket, and brand.
Many commercial-style home machines from Gaggia, Rancilio, ECM, Profitec, Lelit, and similar brands use a 58 mm portafilter. De’Longhi machines commonly use smaller, model-specific sizes, often around 51 mm, while some Breville machines use 54 mm and others use 58 mm. The brand alone is not always enough to identify the correct part.
For the safest purchase, match all three of these details:
- Diameter: such as 51, 54, or 58 mm.
- Locking design: the number and position of the portafilter ears or tabs.
- Basket style: pressurized or non-pressurized, plus the desired dose capacity.
Standard Sizes
See also: How to Replace Espresso Machine Water Filter (2026): Step-by-Step • How to Adjust Espresso Machine Brew Temperature (2026): Step-by-Step
The measurements below refer to the nominal basket or portafilter diameter. Actual outside dimensions can vary slightly because of the metal rim, locking ears, and manufacturer tolerances.
| Nominal size | Diameter in inches | Diameter in centimeters | Common applications | Typical dose range |
|---|---|---|---|---|
| 49 mm | 1.93 in | 4.9 cm | Some compact and older home machines | 7–12 g |
| 51 mm | 2.01 in | 5.1 cm | Many De’Longhi and entry-level machines | 7–14 g |
| 53.3 mm | 2.10 in | 5.33 cm | Selected specialty and prosumer machines | 14–18 g |
| 54 mm | 2.13 in | 5.4 cm | Many Breville and Sage home machines | 15–18 g |
| 57.5 mm | 2.26 in | 5.75 cm | Some European and older machines | 14–18 g |
| 58 mm | 2.28 in | 5.8 cm | Commercial and prosumer-style machines | 18–21 g |
| 58.5 mm | 2.30 in | 5.85 cm | Selected 58 mm systems and precision baskets | 18–22 g |
These sizes are not interchangeable. A 54 mm basket will not correctly replace a 58 mm basket, even if the portafilter appears close in size. Likewise, a 58 mm portafilter from one manufacturer may not lock into another brand’s group head because the ears are positioned differently.
Bottomless, or naked, portafilters usually retain the same diameter and locking system as the original part. The difference is that the spouts and lower metal body are removed, exposing the basket. This makes it easier to see channeling, uneven tamping, or spurting, but it does not make an incompatible portafilter fit.
How to Measure Your Space
- Find the machine model number. Look on the front, rear, underside, or original manual. A model number is more reliable than a general product name such as “espresso maker” or “Barista.”
- Remove the existing portafilter. Let the machine cool, release pressure, and remove the basket. Measure the inside diameter across the basket opening, not the outside edge of the handle or metal rim.
- Measure in millimeters. Use digital calipers if available. Measure across the widest point from inside wall to inside wall. A tape measure is less precise and may confuse a 54 mm basket with a 58 mm one.
- Count the locking ears. Look at the metal rim that twists into the group head. Note whether it has two or three ears, and measure their approximate thickness and position.
- Check the locking angle. Insert the original portafilter without coffee and note how far it turns before becoming tight. A replacement that stops too early or rotates far past the original may have the wrong ear geometry.
- Measure vertical clearance. If you are buying a taller handle or a bottomless portafilter, measure from the counter to the bottom of the group head and then to the cup shelf. Leave room for the portafilter to rotate into place without hitting the machine body.
- Confirm basket depth and dose. A 54 mm, 18-gram basket may be deeper than the stock basket. Check that the machine can accommodate the filled basket without the coffee puck pressing against the shower screen.
- Compare photographs carefully. Product listings should show the underside and locking ears. A listing that only states “fits espresso machines” without naming your exact model deserves extra caution.
By Room or Use Case
Everyday home espresso
For daily cappuccinos, lattes, and americanos, a standard double-basket portafilter is usually the most practical choice. Match the replacement to the factory diameter and choose a basket capacity close to your normal recipe. A 14–18 gram basket suits many smaller home machines, while a 58 mm machine commonly uses an 18–21 gram basket.
Breville or Sage Barista Express
The Barista Express BES870XL uses a 54 mm portafilter. Compatible options include stainless-steel bottomless designs and versions with walnut handles. The examples in this category range from about $26 to $69, with the higher-priced option including a genuine American walnut handle. Check that the listing specifically names the Barista Express or BES870XL and includes the correct 54 mm basket.
Beginner machines with pressurized baskets
If your machine came with a dual-wall or pressurized basket, do not assume that a bottomless portafilter will produce the same result. A bottomless portafilter normally pairs with a single-wall basket and freshly ground coffee. It can improve control for experienced users, but it may expose inconsistent grinding or tamping. Confirm the basket style before switching.
Commercial-style home machines
A 58 mm portafilter is common on machines designed around commercial group-head standards. It offers a broad selection of baskets, tampers, dosing funnels, and distribution tools. However, “58 mm” still does not guarantee universal compatibility. Verify the manufacturer, ear configuration, and group-head standard before ordering.
Shared kitchens and limited counter space
If the espresso machine sits beneath cabinets or on a shallow counter, prioritize handle length and clearance. Bottomless portafilters can have longer or more decorative handles than the original. Measure the available front clearance, especially if the machine must be moved forward to lock in the portafilter.
Common Sizing Mistakes
- Buying by diameter alone: The right millimeter measurement does not guarantee the right tabs or locking angle.
- Measuring the outside rim: Measure the basket’s usable inside diameter instead.
- Confusing tamper size with portafilter size: A tamper may be slightly smaller than the basket to prevent binding. It is not always labeled with the exact same measurement.
- Ignoring the basket: Some portafilters include a basket; others are sold empty. Confirm whether it is single-wall, dual-wall, single, or double.
- Assuming every Breville machine uses 54 mm: Several Breville models use different systems. Match the exact model number.
- Overlooking dose capacity: A deep 18-gram basket may not suit a machine designed for a smaller dose or a low-clearance shower screen.
- Forgetting the handle: A wooden or oversized handle can hit cabinets, cup racks, or the counter even when the metal portafilter fits correctly.
FAQ
What size portafilter fits a Breville Barista Express?
The Breville Barista Express BES870XL generally uses a 54 mm portafilter. Choose a replacement that names the Barista Express or BES870XL and verify the included basket and locking-ear design.
Can I use a 58 mm portafilter on a 54 mm machine?
No. The diameter, group-head opening, basket rim, and locking tabs are different. A 58 mm portafilter will not safely substitute for a 54 mm model.
Is a bottomless portafilter better?
It can be useful because it exposes the extraction and helps diagnose channeling. It is not automatically better, however. It requires a compatible basket, an even grind, accurate dosing, and consistent tamping. It may also create more spray while you are learning.
What size tamper should I buy?
Choose a tamper based on the basket’s actual inside diameter, not only the portafilter label. For a 54 mm system, a tamper around 53.3–53.5 mm is common; for a 58 mm system, many tampers measure about 57.3–58.4 mm depending on the basket. Confirm the basket manufacturer’s recommendation before ordering.
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