What size portafilter does the De'Longhi Dedica Maestro Plus (EC950M) use?
The De'Longhi Dedica Maestro Plus (EC950M) uses a 51mm portafilter (proprietary 51mm).
Do 58mm baskets fit the De'Longhi Dedica Maestro Plus (EC950M)?
No. The De'Longhi Dedica Maestro Plus (EC950M) uses a 51mm portafilter, so 58mm baskets do not fit — you need parts made for the 51mm format.
Does the De'Longhi Dedica Maestro Plus (EC950M) take pressurized or non-pressurized baskets?
It uses both pressurized and non-pressurized (single- and dual-wall) baskets.
Sources
https://www.delonghi.com/en-us/p/coffee-accessories-dlsc085-bottomless-portafilter/DLSC085.html?pid=AS00009101(archived) — Official De'Longhi (US) DLSC085 Bottomless Portafilter accessory page, read firsthand 2026-07-24. States the portafilter is '51mm DIAMETER.' and is 'Compatible with all De'Longhi La Specialista and De'Longhi Dedica Maestro models.' The Dedica Maestro Plus is a Dedica Maestro model, so its portafilter is 51mm — De'Longhi's own accessory page carries the whole size-to-machine chain.
https://www.delonghi.com/en-us/p/dedica-maestro-dedica-maestro-plus-espresso-machine-with-automatic-steam-wand/EC950M.html?pid=0132106247(archived) — Official De'Longhi (US) Dedica Maestro Plus EC950M product page, read firsthand 2026-07-24. Confirms the model name 'Dedica Maestro Plus' and that it ships with 'both single and double wall filter baskets with up to 20g dose': 'The single wall basket allows you to brew like a pro, giving you greater control', while 'the double wall basket is more forgiving, better suited for beginners and store-bought pre-ground coffee beans.' So both non-pressurized (single-wall) and pressurized (dual-wall) baskets are included.