Thank you all for your quick response. I have noticed that feature and do give size of my original paintings. However I felt that this site is more focused on POD and hence visitors would not notice that.
But as you all say so, I should be positive about that feature now onwards! :)
Also, If anyone knows a better place to sell originals, please do share.
I have heard a lot about Saatchi art and Etsy but still not sure I should opt for it or not.