I use these Ultra Pro 25-count 2-Piece boxes to store my KMC-Sleeved BattleCON cards. The sleeved cards fit in these boxes perfectly but the boxes themselves are a mixed bag.

I purchased a total of 28 boxes (14 quantity) through Amazon. About 14 of the boxes are tight enough that if you lift the box up from by the lid, the entire box lifts with it. These boxes are really secure. But the other 14 boxes are too loose. This has resulted in my spilling of several cards when I pull out the box and the pieces separate. I would have hoped all boxes had a sort of clicking mechanism to ensure that they don't open up randomly. If the top of the boxes was tighter, this wouldn't be an issue. But because this results in jeopardizing the cards inside, I have to dock two stars. I have the same issue with the Ultra Pro 50count 2-Piece boxes as well in about the same ratio.

Also, not a big enough of an issue to warrant removing a star, but at the bottom of one side of each of the boxes is a raised "Made in China" text that is a bit distracting. Has no effect on the cards, but it's not ideal.
I use these Ultra Pro 25-count 2-Piece boxes to store my KMC-Sleeved BattleCON cards. The sleeved cards fit in these boxes perfectly but the boxes themselves are a mixed bag. I purchased a total of 28 boxes (14 quantity) through Amazon. About 14 of the boxes are tight enough that if you lift the box up from by the lid, the entire box lifts with it. These boxes are really secure. But the other 14 boxes are too loose. This has resulted in my spilling of several cards when I pull out the box and the pieces separate. I would have hoped all boxes had a sort of clicking mechanism to ensure that they don't open up randomly. If the top of the boxes was tighter, this wouldn't be an issue. But because this results in jeopardizing the cards inside, I have to dock two stars. I have the same issue with the Ultra Pro 50count 2-Piece boxes as well in about the same ratio. Also, not a big enough of an issue to warrant removing a star, but at the bottom of one side of each of the boxes is a raised "Made in China" text that is a bit distracting. Has no effect on the cards, but it's not ideal.