The area around New Market is full of shops {like Sumangal} who stock readymade suits as well as a range of great fabrics and will tailor a jacket or suit for you in a jiffy. These places are very popular with Kolkata’s young crowd. Just before winter {and the wedding season Christmas and New Year parties begin}, you will find the stores full of customers looking for something snazzy for parties.
The area around Dharmatala and beyond has a whole lot of suit tailoring shops like Akberally’s {near Esplanade east} and Shah Brothers on Madge Lane near Globe Cinema.