QR codes can be used by businesses, charities, and even people for everyday use. Stand out with 3D printed QR codes, which come in 3 sizes: Small: 3.3 in x 3.3 in Medium: 4.5 x 4.5 in Large: 6.0 x 6.0 in Note: the logo displayed in the middle is optional and free, file must be emailed after purchase.