As per the NSE circular, the lot size for Nifty 50 will be reduced from 75 to 65, while Bank Nifty will go down from 35 to 30. Similarly, the lot size for Nifty Financial Services will be trimmed from 65 to 60, and for Nifty Mid Select, it will drop from 140 to 120. Meanwhile, the lot size for Nifty Next 50 will stay unchanged at 25.