Photo quality is entirely dependent on the quality of photo file you provide – as a rule of thumb, screenshots and facebook images are generally low quality and may appear grainy as a final product
Photos should be clear (not overly dark / or overexposed)
Photos should be high quality and high resolution (usually indicated by a larger file size)
Photos should be suitable for cropping i.e. avoid close-ups or your subject too close to the edges of the image (the image needs to be cropped in a circle shape and closeups may result in white areas on your print)
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