What size portafilter does the Breville Barista Pro use?
The Breville Barista Pro uses a 54mm portafilter (proprietary 54mm).
Do 58mm baskets fit the Breville Barista Pro?
No. The Breville Barista Pro uses a 54mm portafilter, so 58mm baskets do not fit — you need parts made for the 54mm format.
Does the Breville Barista Pro take pressurized or non-pressurized baskets?
It uses both pressurized and non-pressurized (single- and dual-wall) baskets.
Which baskets are confirmed to fit the Breville Barista Pro?
Breville 54mm Filter 1 Cup Dual Wall; Breville 54mm Filter 2 Cup Dual Wall; Breville 54mm Filter 2 Cup Single Wall; IMS B62 Competition 1 Cup 54mm (B62.51TH23E); IMS B62 Competition 2 Cup 54mm (B62.52TH24E) — each verified against manufacturer sources (listed below).
Sources
https://www.breville.com/en-us/product/bes878(archived) — Official Breville (US) product page for the Barista Pro BES878, read firsthand 2026-07-04. Feature list states verbatim 'High quality 54mm portafilter' and 'Manual removable magnetic tamper'; included accessories list 'Single & Dual Wall (1 & 2 Cup) Filter Baskets' plus 'The Razor Precision Dose Trimming Tool'. Single-wall is Breville's term for non-pressurized baskets and dual-wall for pressurized, so both basket types ship in the box.