Made for the normal card format:
width: 54mm
length: 85,5mm
hight: 1mm
Neatly arrangement for all those cards.
V2 and V3 will touch the cards only on the left and right side.
So the magnet stripe and the chip is secured from getting scratches.
V3 has a thin bottom (i use this version and i like it).
V2 is the normal 72mm box with card slots.
V1 looks the best, but it will touch the end of the magnetic stripe - but V1 is awesome for visiting or business cards without those stripes.