QR code size is important when making QR codes. Especially since many companies today are generating the code, printing, posting it on walls, billboards and magazines and enticing costumers to scan it on many different mediums. However the sizing of QR codes is often overlooked when it is a important factor to keep in mind when creating a QR code campaign.
The size of your QR code in relation to its scanning distance should
be considered before you rush off to the printers to have it printed. Going
back to the basics of this black and white diagram, the more information you
placed in it, will increase its data density which will affect the size of the
dots in your code. This has a direct relation to the scanning capability of
your device, because by then the size of the data dots will be below the
resolution limits of the scanning device.
The most effective size to print your QR codes is determined by how
far the image will be scanned and the size of the data dots in it which can be
calculated through this formula:
Minimum QR code size = (Scanning Distance/Distance Factor)*Data
Where scanning distance is the space from where you will post your
code and the person who is going to snap a picture of it.
Distance Factor starts with 10, with factors of poor background
lighting, mid light colored QR code being used instead of black and white and
frontal scan not being done reducing the distance factor by one point for each
Data Density Factor is the number of columns of dots in the QR code
image which you will divide by 25 for a normalized version of a Version 2 QR
code whose data dot size of 0.4mm across makes a QR code reliably scannable.
Printing the right QR code size is the determining factor whether
your realty marketing campaign will be a success or not. Don’t rush,
continuously test to get the most effective size suitable for your needs.