Winkles is here to help!
Please let me know how I can help you.
I've sold a bunch of games and I've actually never used boxes. I just wrap them in bubble wrap and then wrap the whole thing in paper and I haven't had any complaints.
Good thing you haven't sent a game to me. I would reject it. Always use boxes with lots of packing material. Some of us care if the box gets dinged or crushed corners.