FLYER PRINTING SECRETS

I just have a matter about how to order with your System. What is the measurement of an A5 doc (50 % of the A4) in your platform? I choose to buy a double sided flyer. I want to substantiate that "Entire Colour" to the back again side means this? Thanks! one Solutioneighty lb. paper includes a smooth, shiny coating that guards flyers from becoming