When you trade in the currency derivatives market, you have a standardized contract in terms of common quantity and one can only trade in multiples of this quantity. This is called Lot size. Following are the Lot size of each currency pair (per 1 lot):

USDINR- 1000 quantity in 1 lot

GBPINR- 1000 quantity in 1 lot

EURINR- 1000 quantity in 1 lot

JPYINR- 100000 quantity in 1 lot