National Stock Exchange announced lot sizes of 14 additional futures and options contracts on Wednesday that will start trading in F&O today

3i Infotech - 1,350
Aptech - 650
Bhushan Steel & Strips - 250
Biocon - 450
CMC - 200
Havells India - 400
Lakshmi Machines - 100
NIIT Technologies - 600
Nucleus Software Exports - 550
Sasken Communications Technologies - 550
Tech Mahindra - 200
Tulip IT Services - 250
Welspun Gujarat Stahl Rohren - 800
Yes Bank - 1,100
With this inclusion, total number of stock contracts in NSE's derivatives segment will be 207, excluding five index-based contracts. NSE's derivatives segment also has five index contracts including three on broad market indices i.e. Nifty, Nifty Junior, and CNX 100, and two sector specific contracts namely CNX IT and Bank Nifty.

sources: moneycontrol.com