Sorry @seethersan I misunderstood your question then. I don’t think that option exists but maybe the frappe guys have an idea when they are in office tomorrow. In any case this is not a bad idea and you could suggest a “Custom” option that allows defining the print size in mm as a “feature implementation” Git issue at Issues · frappe/erpnext · GitHub? If this is super important to you or your company you could have it be a paid feature implementation that shouldn’t cost too much.