Pankaj,

There are so many specirfic variables in your question, it is difficult to answer in more than very generic terms.

Location, type of outlet, markets, costs of delivery & stocking, rental, utilities, labor, insurance, local licensing and business codes, threat analysis, and on and on and on.
These are a few that come to mind.

I'd suggest you make some friends in the business near where you plan to open. Ask them what they think.

Good Luck!

Source: http://www.abusinessmentor.com

There are dozens of important questions with respect to opening a store in any category. However, there is one question that I think trumps all the others.

How will your store be different, unique and remarkable? If you don't answer this question very decisively (especially in the apparel category) I can assure you, you're in for struggle.

Chances are you won't be the cheapst option for customers. You probably won't be the most convenient either. So, how will you stand out? What aspects of your product, service or store experience will make you "famous" amongst customers and make them tell others about you.

Long before you begin planning location, inventory levels or merchandising, you need to figure out what sets you apart from competitors. Whatever that is, you'll need to dominate in it. Head and shoulders above anyone else in the market.

Here's an article and a video that can help you more easily figure out your store's positioning.

Best of luck!

Source: http://www.retailprophet.com