At first, that might not seem like anything special, until you realize that clear files themselves are a weird size.
Instead, the pliable plastic document holders are actually translucent because of their thin material, and often decorated with anime artwork.
However, thanks to one of Japan’s favorite budget-friendly home furnishings shops, instead of your clear files just sitting there, they could be hanging everywhere.
So when you try to frame a clear file, you’re essentially putting a document holder inside of another document holder, and that means that a for-A4-size clear file won’t quite fit in a for-A4-size frame.