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QR Code Printing Guidelines & Best Practices 32 × 32 mm or 1.25 × 1.25 inches, excluding quiet zone (the white space included around the QR Code in the EPS) is the minimum size that guarantees that ALL camera phones on the market can properly read the QR Code. 26 × 26 mm or roughly 1 square inch, excluding quiet zone covers 90% of the phones on the market. - OUR CURRENT RECOMMENDATION The latest camera models, which have improved macro capabilities, can deal with QR Codes that are less than 10 mm (0.4 in) wide and high. For example, an iPhone 4 will be able to scan this size, but an iPhone 2/3.x with 2.0 megapixel camera and no autofocus may not. For good reader accuracy good contrast between the background and the bar color itself is very important. The bar code should have a dark color on a light background. You cannot go wrong by treating the QR Code as line art, using black on white. Signage
A QR code generator is a software or online application that allows you to create QR codes. QR codes are probably the most popular and flexible two-dimensional barcode that is used by most businesses and individuals for anything from their marketing campaigns, education and even in ordinary lives and lets not forget just for fun! As QR codes gain popularity, more and more Web sites are offering free QR code generator services. With all the choices, and because they are all similarly free, most people just use the first QR code generator they find. But how do you distinguish one service from the other?
Comment QR Code on a Business Card but how? ( Added : January 18th, 2010 QR Coded LinkedIn profile with tracking on your business card ).