Espresso Tamper Sizes: 51, 54 or 58 mm, Spring or Flat
Quick Answer Your tamper size is set by your portafilter basket, not your taste. De'Longhi Dedica and Stilosa machines take about 51 mm, Breville and Sage machines marketed as "54 mm" actually want a 53.3 to 53.5 mm base, and Gaggia, Rancilio, Rocket and most prosumer machines use the 58 mm class, which runs anywhere…