Newbie question about supports

[boardkov]

Hello,

This is an extreme newbie question about the need for supports in printing my first 3D object. I am printing a simple belt buckle. I have placed it on it's back for printing. There is an arch in the buckle, causing it to be about 1/4" raised off the platform in the middle. Do I need supports to print this successfully? Is this the best orientation for successful printing?