It all started with a card holder which had arbitrary lines and couldn't hold any cards in place.
This one can hold cards but still looks a bit weird. And yes, it switched sides.
Ah yes, the clean-cut look but still has issues with ratios.
This try solved a big aesthetical problem that is only seen when cards were in it.
The final design, aesthetically sound and clean-cut in order to go through the cards with ease.