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C3 / A3 ParcelMax Mailers - Maximum Royal Mail Small Parcel Qualifying Corrugated Mailer (349mm x 445mm x 6mm)

  • Product Code: PMAX-C3#
  • £0.00

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Available Options


ParcelMax Mailers - Strongest A3 C3 Cardboard Envelopes 

External Dimensions: 349mm x 445mm

Internal Dimensions: 340mm x 440mm x 6mm

ParcelMax C3 A3 Cardboard Envelopes / Mailers are designed to be posted as a Royal Mail Small Parcel size item.

As you may be aware, traditional C3 / A3 envelopes exceed the size allowed to be posted as small parcels, meaning they have to go through Royal Mail as Medium Parcels costing considerably more.

ParcelMax Strong C3 A3 Envelopes Mailers provide the ultimate postal protection for your A3 items. They are perfect for protecting A3 pictures, prints, paintings, Point of Sale material and many other items that need to arrive with customers in a pristine state.


These extremely strong ParcelMax C3 size envelopes / boxes for A3 documents, calendars, etc and have the advantage of a surprisingly low weight for their superb strength. 


Weight: 137grams (Appx)

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Shipping Rates & Upgrades


FREE SHIPPING ON ORDERS OVER £30 (ex VAT)...
so no nasty surprises at checkout.

With the vast majority of items listed on this site being supplied without an additional charge for postage on orders over £30 NET .

The only time you may have additional charges is when you’re buying bulk quantities, very large items or you’re located offshore or in certain parts of the Scottish Highlands.

Please note that we cannot deliver to PO boxes.

Please check here for Offshore and Scottish Highlands shipping upgrades

If you require a faster delivery, click here for timed shipping upgrades

If you are ordering outside of the UK, please click here to see our international rates