It's not really the box size. But see how like the cover of the box is different than conventional ones. The cover goes inside the sides as opposed to surrounding it. And plus you can poke a hole in the middle to make it easier to open. 990s that I seen have a conventional box with a regular lid...
Hey, just had a question and wanted to get some input. I bought a pair of the anniversary 990s in a navy blue colorway from nordstrom's website. I just wanted to know why the box looks different than usual. Like it looks smaller. Is it legit? Thanks for your the help.