We don't recommend using thin borders or carefully centred content which hugs the edge of the safe area. All MOO products have a 2mm cutting tolerance, which means thin borders or carefully centred graphics can end up being slightly uneven. The smaller the border, the more apparent this small imperfection will be. To avoid potential disappointment, we'd recommend using a wide border (which extends well inside the safe area) or removing it altogether and making them full bleed.
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