If buy a dress online, is it reliable?

yes it is 

Yes I think it is reliable.
:) 

Online shopping is always reliable when you consider below precautions:
Reputation of the website.
Always read feedback about the site.
Never give your password to anyone.
Protect you credit card details. Never disclose any of the confidential information to anyone.
All above factors ensures risk free online shopping in India.

Sure, why not? :)

As long as you come to reliable and trustworthy websites to buy the products, it's safe.

If you are not sure about what is reliable sites, check out these factors :

- Security credential (SSL) : visiting https:// sites instead http:// is surely better. Website which has security credential is guaranteed as a safe safe.

- Check out the website look : Website which build from professional is always look great in web design and appearance.

- And the most important thing is don't submit your personal information. Website always require information from you, but be careful with your security information.

See : - Staying safe online

         - Selling online