Portafilters by Size: 51, 53, 54 and 58 mm, and Which Machine Uses Which
A portafilter is the handled holder that carries the basket of coffee and locks into the machine. Most home machines use one of four sizes. Breville's Barista and Bambino lines are 54 mm, and its Dual Boiler is 58 mm. Your machine already came with one, so buy another only for a clear reason, and buy by model, not by millimeters.
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A portafilter holds the basket of coffee and locks into the group head. Breville's Barista and Bambino machines use 54 mm, and the Dual Boiler uses 58 mm. The Gaggia Classic uses 58 mm per Gaggia, and the Rancilio Silvia 58 mm per retailers. Don't buy by size alone: the part must lock into your group, so look for your model on the page.
On this page
Your first job here isn't shopping. It's finding out which size you have, because tamper, funnel, basket and screen all follow from that number. If you already know, and want a replacement or a look at the shot from underneath, skip ahead.
For the portafilters below we only have the Amazon listings, and we name them as options and not as picks. Our recommendation is about how to choose. Values from a listing are marked as such.
Portafilter size chart by machine
| Size | Machines | Source |
|---|---|---|
| 51 mm | De'Longhi sells a 51 mm tamper for its own filters; it names no model on the page we read | De'Longhi, so check your manual |
| 53 mm | Gaggia Espresso Deluxe and Espresso Style | Gaggia, filter pages listing 230 V |
| 54 mm | Barista Express, Barista Express Impress, Barista Pro, Barista Touch, Barista Touch Impress | Breville's part page |
| 54 mm | Bambino, Bambino Plus | Breville |
| 58 mm | Breville Dual Boiler, Dynamic Duo, Oracle Dual Boiler, Oracle Jet | Breville |
| 58 mm | Gaggia Classic, E24 | Gaggia's E24 page, retailers |
| 58 mm | Rancilio Silvia | Per retailers |
| Not stated | Budget machines with a listing only | Manual, or measure |
The Barista Pro entry is worth a note, because Breville's product page doesn't state the size. Its US manual Q26 gives a 54mm stainless steel portafilter, and its part page for the 54 mm Portafilter Assembly names that machine.
When to buy another one
- You lost or damaged yours. Buy the maker's part first. Breville sells a 54 mm Portafilter Assembly that names five machines, and Rancilio parts are listed below.
- You want to see the shot. A bottomless portafilter has no spouts, so you see how the coffee runs. Breville sells 54 and 58 mm versions and says they help you diagnose your extraction. Our bottomless portafilter page covers the case for it.
Better espresso isn't on the list. A nicer portafilter won't fix a poor grind or an inconsistent dose. Start with a scale and dialing in first.
Normcore 58 mm bottomless
A bottomless 58 mm portafilter listed for the Gaggia Classic Pro.
Seller data only: We only have the Amazon listing for this product. We list it as an option, not as a recommendation.
Why here: Listed for the Gaggia Classic Pro, Carezza and Cubika Plus. We only have the listing, so check the fit against your own model.
Best for: Gaggia owners who want to see how the shot runs
- Listed for the Gaggia Classic Pro, Carezza and Cubika Plus
- We only have the listing, so check the fit against your model
- Type
- Bottomless portafilter
- Fits
- 58 mm Gaggia, per listing
- Price class
- Mid-range
Which portafilter for which machine
If you own a Gaggia Classic and want to see the shot → Normcore 58 mm bottomless · Seller data only
View(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on AmazonIf you own a Rancilio Silvia and need a spouted replacement → Rancilio commercial portafilter · Seller data only
View(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on AmazonIf you own a Rancilio and already have baskets → Rancilio RR portafilter 58 mm · Seller data only
View(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on AmazonIf you own a 54 mm Breville
If you own something else
Three listings side by side
| Seller data onlyNormcore 58 mm bottomless | Seller data onlyRancilio commercial portafilter | Seller data onlyRancilio RR portafilter 58 mm | |
|---|---|---|---|
| Type | Bottomless portafilter | Double spout portafilter | Double spout portafilter |
| Fits | 58 mm Gaggia, per listing | Silvia, Epoca, Classe, per listing | 58 mm Rancilio, per listing |
| Price class | Mid-range | – | – |
| Best for | Gaggia owners who want to see how the shot runs | Rancilio owners who need a spouted replacement, after checking their machine version | Rancilio owners who already have baskets |
| On Amazon(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on Amazon | On Amazon(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on Amazon | On Amazon(paid link to Amazon, opens in a new tab)Ad · paid link · check price & delivery on Amazon |
Normcore 58 mm naked
The Normcore 58 mm portafilter* is listed for the Gaggia Classic Pro, Carezza and Cubika Plus. A bottomless design shows you how the coffee runs, and it doesn't touch the wiring. Gaggia's manual warns that parts it doesn't recommend can void the warranty, so read your terms first. We only have the listing.
Rancilio commercial double spout
The Rancilio double spout portafilter* names the Silvia, Epoca and Classe in its title. The Silvia is a home machine, while the title calls the part commercial, so check your Silvia's version with the seller. We only have the listing.
Rancilio RR 58 mm
The Rancilio RR portafilter* gives a 58 mm size and part number 10071045R in its title, and says no basket is included. That makes it a reasonable pick only if you already own baskets. See our baskets page. We only have the listing.
What to look for
- Your model on the page. That counts for more than the millimeter figure.
- Spouts or none. Spouts split the shot into two cups. Bottomless suits one cup and shows you the flow.
- The basket. Some parts arrive without one, per the listing. Single wall is for ground-fresh coffee, while dual wall is for pre-ground, as Breville sets it out.
- Tool match. A new size means a new tamper, funnel and sometimes grinder cradle. Breville's Smart Grinder Pro lists separate cradles for 50 to 54 mm and 58 mm.
Common mistakes
- Buying a tool by the label on the machine alone. Read the fit notes and measure.
- Assuming all 58 mm parts swap. Look for your model.
- Using a portafilter to fix a shot problem. A bottomless portafilter shows you channeling. It doesn't cure it. Puck prep does most of that work.
- Paying for tools you already own. The accessories page lists what your machine may have included.
What the spouts do
Two spouts split the flow so you can fill two cups at once, or a single wide one. That's all they do to the coffee, as far as anything we read shows. Lift them away with a bottomless design, and you can watch the shot form on the underside of the basket.
Still choosing a machine? Size is a real reason to pick one over another, because 54 and 58 mm tools don't swap. The start page begins with what you drink, and these questions end in one machine:
Our recommendation
Keep the portafilter that came with your machine until there's a reason to change. If you do change, find your model on the maker's or seller's page. If the machine itself is still open, the Barista Express* is 54 mm and the Breville Dual Boiler* is 58 mm, but buy either for what it does as a machine, because a portafilter shouldn't decide that for you. We compare by maker pages, listings and published sources, and we don't test portafilters ourselves.
Asked at the bar
What is a portafilter?
It's the handle and metal holder that carries the filter basket. You fill the basket with ground coffee, tamp it, and lock the portafilter into the group head, where water is forced through the coffee. Spouts or an open bottom underneath send the espresso into your cup. The word is the same on every machine, though sizes differ.
What size portafilter does a Breville use?
It depends on the machine. Breville's 54 mm Portafilter Assembly page names the Barista Express, Barista Express Impress, Barista Pro, Barista Touch and Barista Touch Impress, and its Bambino page lists 54 mm too. The Dual Boiler and Dynamic Duo are 58 mm, and Breville's 58 mm accessory pages also name the Oracle Dual Boiler and Oracle Jet.
Are all 58 mm portafilters interchangeable?
No, not as far as we can tell. Makers and sellers name specific machines for their 58 mm parts: Breville names its own, and the listings below name Gaggia or Rancilio models. Diameter is one measurement, and the part still has to lock into your group head. If your model isn't named, ask the seller before you buy.
Is 53.3 mm a portafilter size?
Not one that we could confirm. 53.3 mm is the size of tampers sold for Breville's 54 mm baskets, so it describes the tool and not the machine. Gaggia does list 53 mm filters on its Espresso Deluxe and Espresso Style pages, which is a different case. Check your manual and measure if you are unsure.
Does a bigger portafilter make better espresso?
We found no evidence that settles it. Breville says of the Dual Boiler that its 58 mm portafilter helps promote a more even extraction, but that's a maker's claim. What is clear is that a 58 mm machine has a large choice of baskets and tools, while your grind and routine still matter far more than the number.
Where this comes from
Next round
AccessoriesWhich espresso accessories are worth buying first: scale, tamper, pitcher, WDT tool and more, sorted by portafilter size, with what your machine already includes.
Bottomless portafiltersA bottomless portafilter shows you channeling, and it doesn't improve the shot on its own. What it reveals, what it hides, how to check the fit, and what to expect.- Espresso basketsEspresso baskets explained: single wall vs dual wall (pressurized), which machines ship with which, what VST and IMS publish, and how to match a basket to your dose.
- TampersWhich espresso tamper fits your machine: 51, 53.3, 54 and 58 mm by model, what calibrated and spring-loaded tampers really do, and where the 30 lb figure comes from.
Barista Express accessoriesWhat fits the Breville Barista Express: 54 mm portafilter, baskets, tamper, funnel and water filter, what Breville names for the BES870, and what's in the box.
Gaggia Classic ProGaggia Classic Pro and E24: Gaggia's own values, the manuals on steam and descaling, what mods risk for the warranty, and who should pick something else.
semiautomaticespressomachine.com Editorial Team
Espresso gear & shot craft
We are the editorial team at semiautomaticespressomachine.com. We read maker spec sheets, manuals, standards and published research on espresso and turn them into plain-English buying advice, with sources on every page. We do not run lab tests, and we say so openly.
- Spec sheets & standards read
- Sources on every page
- No lab tests – stated openly
- Publisher details in the imprint