To mat or not to mat

I have a question for you.
I'm thinking about getting mats for the prints I sell on Etsy.
These mats would be white and fit 5"x7" prints.
So that they can be framed in a 11"x14" frame.
If you were looking at art to buy
 would you like the idea of it being matted and ready to be framed.
I think it would give the art presense.
What do you think?
They would look something like this below.