So this card is taking over the internet I do believe! From my research it is from an optical illusion called HyperCard, it sort of plays with the mind and how the holes get in the card.
I have seen this card done on a few websites as well.
These are the ones I watched to learn the technique:
Mixed Up Craft:
It is best to watch the video to understand how to make the card the easiest way.
Well, it’s impossibly SIMPLE! Let’s do this!
Portrait Orientation Measurements and Video