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