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📏 Reference Chart · 2026The size is set by your machine, not by preference — and buying a basket, tamper or bottomless portafilter in the wrong diameter is a mistake you find out about after opening the packaging. Every size below was checked against at least two independent sources on 2026-09-01; machines we could not verify are not listed rather than guessed.
Written and reviewed by the CoffeeLabAdvisor editorial team · Published 1 September 2026 · Last updated 2 September 2026
The short answer: most current Breville home machines use 54 mm; the Breville Dual Boiler and most prosumer machines — Gaggia, Rancilio, Lelit — use 58 mm, the common commercial format; De'Longhi's La Specialista line uses 51 mm; and bean-to-cup machines have no portafilter at all. Your exact machine is in the chart below.
| Machine | Model | Size | Our coverage |
|---|---|---|---|
| Gaggia Classic Evo Pro | RI9380/49 | 58 mm | Full review |
| Casabrews 5700 | — | 58 mm | Grinder pairing |
| Rancilio Silvia | Silvia M V6 | 58 mm | Full review |
| Breville Dual Boiler | BES920XL | 58 mm | Grinder pairing |
| Lelit MaraX V2 | — | 58 mm | Grinder pairing |
| Rancilio Silvia Pro X | — | 58 mm | Grinder pairing |
| Lelit Bianca V3 | — | 58 mm | Grinder pairing |
| La Marzocco Linea Mini | — | 58 mm | Grinder pairing |
| Machine | Model | Size | Our coverage |
|---|---|---|---|
| Breville Bambino Plus | BES500 | 54 mm | Full review |
| Breville Barista Express | BES870XL | 54 mm | Full review |
| Breville Barista Pro | BES878 | 54 mm | Full review |
| Breville Bambino | BES450 | 54 mm | Full review |
| Machine | Model | Size | Our coverage |
|---|---|---|---|
| De'Longhi La Specialista Arte | EC9255M | 51 mm | Full review |
Most people looking up their portafilter size are about to buy something that has to fit it. These listings were verified against the live Amazon catalog on 2026-09-01, and the fitment line on each card paraphrases the listing's own compatibility statement — check it against your exact model before ordering, because lug design varies between brands even at the same diameter.
58 mm · 3-cup (21 g) basket, factory-cut OEM
Listing states compatibility with Rancilio Silvia Pro, Silvia Pro X and all other Rancilio home models, plus commercial Silvia, Epoca and Classe.
Buy on Amazon →
58 mm · filter basket and 58mm puck screen
Listing states suitability for Casabrews Ultra, 4700Gense, 5700Gense and 5700Pro (plus Barsetto BAE01/02, BAE-V1AP), with a check-your-original-portafilter caution.
Buy on Amazon →
58 mm · 3 springs (15/25/30 lb), leveling plate, stand
Listing states a spring-loaded 58 mm tamper with a stainless flat base and a leveling plate that rests on the basket rim, supplied with interchangeable 15 lb, 25 lb and 30 lb springs, and states it fits 58 mm standard baskets.
Buy on Amazon →
54 mm · 54mm stainless basket, 2-cup (18-20 g)
Listing states compatibility with Breville Barista Express, BES880BSS, BES870XL, BES878BSS, BES500BSS, BES840XL, Pro, Touch, Bambino Plus, Infuser and Duo Temp Pro.
Buy on Amazon →
54 mm · 2-cup basket (max 20 g), 304 stainless
Listing states suitability for Breville Duo-Temp, Infuser, Bambino, Barista Express, Barista Touch and Barista Pro.
Buy on Amazon →
54 mm · 3 springs (20/25/30 lb), 53.3 mm base for 54 mm Breville baskets
Listing states a calibrated spring-loaded tamper with a 53.3 mm base described as a better fit for 54 mm Breville portafilters than common 53 mm tampers, naming the Barista Express, Barista Pro, Barista Touch, Bambino Plus, Infuser and Duo Temp Pro.
Buy on Amazon →
51 mm · three baskets (7-9 g, 16-18 g, 18-22 g), blind basket, scoop, brushes
Listing states compatibility with De'Longhi La Specialista EC9115/EC9155/EC9255/EC9335/EC9355/EC9455/EC9555/EC9665/EC9865/EC9885 and Dedica Maestro EC900/EC950 - and states it is NOT compatible with Dedica EC680/685/885.
Buy on Amazon →
51 mm · Flat 51 mm base, no calibration spring
Listing states a stainless steel tamper with a 51 mm base diameter, 80 mm height and a weight of about 570 g.
Buy on Amazon →The number is the diameter of the filter basket the portafilter holds. It decides exactly one practical thing: which baskets, tampers, dosing tools and bottomless portafilters fit your machine. A 58 mm accessory does not fit a 54 mm machine, and neither fits a 51 mm one.
You will find claims online that one size extracts sweeter, or that a bigger basket produces a better shot by itself. We have not measured any of that and neither have most of the pages asserting it, so this chart stays out of that argument: the size that matters is the one your machine already has.
Bean-to-cup (super-automatic) machines grind, dose, tamp and brew inside an internal brew unit. There is no removable portafilter, so there is no size to look up — and no portafilter accessory to buy:
| Machine | Portafilter | Our coverage |
|---|---|---|
| Jura E8 | None — internal brew unit | Full review |
| De'Longhi Magnifica Evo | None — internal brew unit | Full review |
| Philips 5400 LatteGo | None — internal brew unit | Full review |
| De'Longhi Dinamica Plus | None — internal brew unit | Full review |
| Jura Z10 | None — internal brew unit | Full review |
If that is your machine and you are here because something is wrong with the brewing, the portafilter is not the place to look — our bean-to-cup guide covers how these machines differ.
Every machine below has a full published review on this site — the size on each card is the same catalog record the chart above renders. Prices are live from Amazon at the time this page loaded.
58 mm · Semi-Automatic · No grinder
58 mm · Semi-Automatic · No grinder
54 mm · Semi-Automatic · No grinder
54 mm · Semi-Automatic · Built-in grinder
54 mm · Semi-Automatic · Built-in grinder
54 mm · Semi-Automatic · No grinder
51 mm · Semi-Automatic · Built-in grinder
The Gaggia Classic Evo Pro (RI9380/49) uses a 58 mm portafilter. We verified the size against multiple independent sources on 2026-09-01; they are listed in the source note on this page.
The Casabrews 5700 uses a 58 mm portafilter. We verified the size against multiple independent sources on 2026-09-01; they are listed in the source note on this page.
The Rancilio Silvia (Silvia M V6) uses a 58 mm portafilter. We verified the size against multiple independent sources on 2026-09-01; they are listed in the source note on this page.
The Breville Dual Boiler (BES920XL) uses a 58 mm portafilter. We verified the size against multiple independent sources on 2026-09-01; they are listed in the source note on this page.
The Lelit MaraX V2 uses a 58 mm portafilter. We verified the size against multiple independent sources on 2026-09-01; they are listed in the source note on this page.
The Rancilio Silvia Pro X uses a 58 mm portafilter. We verified the size against multiple independent sources on 2026-09-01; they are listed in the source note on this page.
The Lelit Bianca V3 uses a 58 mm portafilter. We verified the size against multiple independent sources on 2026-09-01; they are listed in the source note on this page.
The La Marzocco Linea Mini uses a 58 mm portafilter. We verified the size against multiple independent sources on 2026-09-01; they are listed in the source note on this page.
The Breville Bambino Plus (BES500) uses a 54 mm portafilter. We verified the size against multiple independent sources on 2026-09-01; they are listed in the source note on this page.
The Breville Barista Express (BES870XL) uses a 54 mm portafilter. We verified the size against multiple independent sources on 2026-09-01; they are listed in the source note on this page.
The Breville Barista Pro (BES878) uses a 54 mm portafilter. We verified the size against multiple independent sources on 2026-09-01; they are listed in the source note on this page.
The Breville Bambino (BES450) uses a 54 mm portafilter. We verified the size against multiple independent sources on 2026-09-01; they are listed in the source note on this page.
The De'Longhi La Specialista Arte (EC9255M) uses a 51 mm portafilter. We verified the size against multiple independent sources on 2026-09-01; they are listed in the source note on this page.
None. Bean-to-cup machines such as the Jura E8, De'Longhi Magnifica Evo, Philips 5400 LatteGo grind, dose and brew inside an internal brew unit — there is no removable portafilter to size. If you are searching for a portafilter for one of these machines, the part does not exist; cleaning and service go through the brew unit instead.
Measure the inside diameter of the metal filter basket (not the outer rim) in millimetres. It will land close to one of the common sizes — 58 mm, 54 mm, 51 mm — and the chart above tells you which your machine ships with, which is more reliable than a tape measure on a curved basket.
No. A 54 mm basket, tamper or dosing tool will not fit a 58 mm portafilter, and vice versa. Match the accessory to the size in the chart before buying anything — this chart exists because that mistake is easy and non-refundable once used.
Every size on this page comes from data/portafilter-sources.json, our verification record: per machine, the size and the two or more independent sources it was checked against, read 2026-09-01. Sources include manufacturer product pages (breville.com, ranciliogroup.com, casabrews.com), the BES870 instruction manual, and named retailer or accessory listings whose fitment lists state the machine model. A machine we could not verify from at least two sources is omitted rather than estimated. We have not measured basket diameters ourselves.