What size portafilter does the Breville Barista Express Impress use?
The Breville Barista Express Impress uses a 54mm portafilter (proprietary 54mm).
Do 58mm baskets fit the Breville Barista Express Impress?
No. The Breville Barista Express Impress uses a 54mm portafilter, so 58mm baskets do not fit — you need parts made for the 54mm format.
Does the Breville Barista Express Impress 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 Express Impress?
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/bes876(archived) — Official Breville (US) product page for the Barista Express Impress BES876, read firsthand 2026-07-05. States verbatim: 'High quality 54mm portafilter'; included accessories list a '54mm stainless steel portafilter' and '1 & 2 cup single and dual wall filter baskets', with 'Assisted tamping with 7˚ Barista Twist Finish' via the Impress Puck System. Single-wall is Breville's term for non-pressurized baskets and dual-wall for pressurized, so both basket types ship in the box.