Many have asked what the proper size is to make their QR code.
How big should the QR code be?
How small can a QR code be
The simple answer is that there is no standard size for a QR code. The long
answer is it depends on your medium that your creating the QR code for.
Your QR code needs to be able to be read from a person using their mobile
phone. This means that if you are creating a billboard, your QR code will
need to be quite large in order to be read from the side walk.
If you create one for television, you may want to test it on different
sized televisions from the normal location you would view your television,
i.e. the couch.
When creating one for print, you want to make sure that the QR code prints
out large enough to not become blurry. Be sure not to make it too large as
you don’t want people to have to hold their phone way away from the paper