Stamp Paper Denomination for Gifting Shares

Our real elder brother & sister will be, by executing Gift Deed, Gifting Shares to us (i.e. to their real younger sisters & brother). My Query: (a) What should be the appropriate denomination of Stamp Paper to be use to execute Gift Deed? (b) Is there any amount slab based on which denomination of Stamp Paper for executing Gift Deed is decided? (c) I would be much obliged to inform me the relevant provision of law which decides the denomination of Stamp Paper for executing Gift Deed? Sincerely, Aditya kumar Jain.