Things are running pretty fast right now and I have to make final decisions on practical issues, such as box sizing. The tip is to make your game fit in an amazon flat rate box (or squeeze more games in that box). But, you have to plan for extra goodies and stretch goals and t-shirts and all that stuff in advance: If you have extra items to ship, you will have to choose early if you are going to put them inside your core game box, or not! If not, make sure you have sufficient space inside your shipping box.
*Seriously, people? Inches? INCHES? What’s wrong with the metric systems? Ahhh!*
Anyway, keep in mind that the sizes on the link describe the inside of the box (which helps a lot). Usps has recently added the “board game box” flat rate box, so remember that if you jump into some older game designers forum or post, this small detail will be omitted. Besides that, talk to your manufacturer cause he may have standard box / board / cards etc sizes to provide you with, and adjusting your game to fit into standard sizes will save you a lot of headache and some money. I think that the Game Crafter is a very handy guide for sizing – even if you don’t intend to work with them for printing, you can always check out their standard sizes – they are widely common between manufacturers (those damn inches again…!).