Also Indian here. If the OP is used to cubes of sugar, he’s probably quite wealthy in India. Indian middle class consumers usually use granulated sugar as the cubes are more expensive, and middle class Indian consumers are usually quite price sensitive.
I think what the OP was trying to refer to here is the granulated sugar that is more popular in India. Mostly the sugar has crystals that are .5-1mm thick while in the us it is closer to the consistency of powdered table salt.