Espresso definition

The definition of an espresso according to the 2020 World Barista Championship Rules and Regulations is as follows:

1. Espresso shot volume: 30mL +/- 5mL
2. Brewing temperature: 90.5 to 96°C
3. Brewing pressure: 8.5 to 9.5 bars
4. Shot time: 20 - 30 seconds