The term “lot" is used in forex trading to describe a quantity.
Typically, a lot denotes 100,000 units of a currency. The term “standard lot” refers to the base currency.
Example: 1 lot in the CHFEUR currency pair is 100,000 Swiss francs (CHF).
Besides the standard lot, the mini-lot (10,000) and micro-lot (1000) are also used.