Avery Premium Address Labels TrueBlock 63.5 x 38.1mm 21UP 2100 Labels

Avery describes it as an opaque black backing that covers what is underneath, so an old address, a previous label or a printed panel does not read through the new one. The black sits behind the printable white face; it is not what you see.

Black. This matters because it has been got wrong in both directions. Our own listing used to say an opaque white layer, which Avery has never said. Some copy in the trade says silver, which traces to an old Avery description block that Avery contradicts in the bullet list on the same page. Avery's current and dominant wording is an opaque black backing.

Avery says it covers everything underneath completely. They publish no opacity percentage or measurement anywhere in this range, and their own category page drops the word "completely", so we will describe what the backing is for and let you test it on the envelope or mailer you actually use.

Laser and inkjet, as Avery specifies. The software code is L7160.

63.5 x 38.1mm, 21 to an A4 sheet, with 100 sheets in the pack for 2100 labels in total. Avery publishes the total and the sheet count; the labels per sheet follows from those two.

Avery sells this range in three board weights and several pack sizes under the same software code. The premium codes are 131gsm, the older shipping, smooth feed and filing codes are 148gsm, and the kraft codes are 200gsm. The TrueBlock name is not tied to a weight: it appears on codes in both the 131gsm and the 148gsm groups. The software code, not the pack size, is what decides whether a template will line up.

Avery's copy says parcels, boxes and mailing tubes. On a 63.5 x 38.1mm label 21 to a sheet that sentence is shared from their shipping range and does not fit. Treat this as an address label.

Not published. Avery gives no opacity figure, no adhesive peel strength, no temperature range, and nothing about water, freezer or outdoor use for any code in this range. If any of that decides the purchase, ask us and we will put it to the supplier rather than guess.

Delivery time depends on your location, the size of your order, and the shipping option selected at checkout. For in-stock items, standard metro delivery in QLD, NSW and VIC is usually 1 to 7 business days. South Australia, Tasmania, Western Australia and the Northern Territory are generally 3 to 12 business days. Express delivery for eligible parcels under 3kg is usually 1 to 4 business days in QLD, NSW, ACT and VIC. Delivery estimates apply to in-stock items only and may vary due to carrier conditions or delays.

If you need to make a change to your order, please contact our team as soon as possible. Once an order has been processed or dispatched, changes may no longer be possible. You can contact us through our Contact Us page for assistance.

Mega Office Supplies ships orders Australia wide and occasionally internationally. The best avenue would be to contact us so we can customise a specific quote for you. Please note that associated international duties, taxes and levies will be the responsibility of the customer.

Mega Office Supplies accepts change-of-mind returns for unopened and unused products within 14 days from the invoice date, provided the item is returned in its original packaging and in resalable condition. Original shipping costs are not refundable, return shipping is the customer’s responsibility, and a restocking fee may apply depending on the product type and supplier. Some items, including electronics, assembled or installed furniture, food, beverages, medicines, custom-made products, and certain bulk or special-order items, are not eligible for return unless required under Australian Consumer Law.

If your order arrives faulty, damaged, or incorrect, please contact Mega Office Supplies as soon as possible. Where required under Australian Consumer Law, a repair, replacement, or refund will be offered. In these cases, Mega Office Supplies will cover reasonable return shipping costs, and photographic evidence may be requested to help process the claim. Items should be reported within a reasonable timeframe after delivery.