Give your parcels and large envelopes a professional finish by using these bright white shipping labels on all your important mail. Avery BlockOut Shipping Labels are the ideal choice for sending parcels, mailing tubes and boxes as they completely cover what's underneath. They are a great cost saver because you will be able to reuse packaging as any old text or label is completely hidden. What a great way to help the environment too, plus these Avery labels are eco-friendly.