EspressoFit

The 57mm portafilter standard

57mm is the size of Lelit's LELIT57 group and tool line, used on its entry-level machines (Anna, Diana). It is one millimetre narrower than the 58mm commercial standard — 58mm baskets and tampers do not fit, and IMS makes a dedicated B64 basket series ('for tamper 57') for these machines.

New to portafilter sizing? See espresso portafilter sizes explained for how 57mm compares to the other standards and why parts don’t interchange across sizes. Also useful: which tamper size fits and groupheads explained.

Know your machine already? Skip the browsing — the parts finder lists everything confirmed to fit it, with the source behind each answer.

58mm57mm54mm52mm51mm
Portafilter standards to scale. A few millimetres is the difference between a part fitting and not — a 51mm basket will not seat in a 58mm portafilter, and vice versa.

57mm machines (1)

57mm baskets (2)

57mm parts (4)