I love your card boxes and have them in many of my game boxes now.
Two thoughts:
1. (inner): The space around the card seems wasted to me. I assume the four vertical tabs around the card are there to aid inserting and removing the cards? That's a nice feature, but you may want to consider a version without those tabs that results in a smaller overall box width and height.
2. (depth): I use both the small and standard size card boxes (pictured). A lot of my decks und up falling between the two. This results in me either having to use two smalls or waste space in the standard. You should consider a size between the two.
Thanks!
