I was wondering what would be a good size for the QR code sign that will hang from or beside the Real Estate sign. The QR code will generate an SMS text message, which will send back the info for the house.
I know I have to test it, but I was thinking a 12" square QR code would be a good size to be scanable from inside a car stopped on the street. I would also put the "TEXT ABCD to xxx-xxx-xxxx" on the sign as well for people who prefer to text rather than scan. (I am using a longcode SMS service)