Yes, there is a recommended size for printing QR codes. QR codes should be printed at the correct size for your print medium to ensure optimal scanning. For dynamic codes, we suggest a minimum size of 2 x 2 centimeters (0.8 x 0.8 inches), while for static codes, we suggest a minimum size of 3 x 3 centimeters (1.2 x 1.2 inches).
When QR codes are smaller than the recommended size, scanning issues can arise because some devices may not be able to scan QR codes of that size. This also applies to QR codes that are too large. In special cases, QR codes can be created as small as 1 x 1 cm, but attention must still be given to their intended use.
If you're unsure about what size to choose, consider the scanning distance and the amount of data stored in the code to determine the most suitable dimensions.