Indian clothes vary according to occasions and seasons. In summers, wear cotton clothes preferably. You can wear heavy traditional clothes on special occasions. And yes... if a dress is too tight or loose, you can get it fit by a local tailor. It's easily available here.
What r u saying we love them too we dont like england, france etc, the ones who used to colonise. Poland didnt colonise. Even our maharaj from rajputana saved polish kids during world war, we have good relations