Hard Backed Envelopes


Board Backed Envelopes or Hard Backed Envelopes?

Both of the above terms refer to the same product & are used for a range of envelopes with a kraft paper front & a cardboard or board back for added strength. We sell only the best quality, excellent value Board backed envelopes to help ensure your contents arrive undamaged and un-bent through Royal Mail, your own country’s postal service or a courier network.

We sell a wide size range of board backed envelopes, allowing you to benefit from the lower prices charged by Royal Mail for Standard Letters and for Large Letters and others that qualify as Small Parcels.

Understanding Sizes

Although many hard back or board backed envelopes are manufactured to suit standard paper sizes many board backed envelopes are produced in alternative sizes for other items that shouldn't be bent during posting such as: photographs, certificates etc.

Standard paper sizes are pre-fixed with an A, e.g. A4, the envelope to suit a particular paper size is pre-fixed with a C. Meaning that a C4 envelope is designed to accommodate an A4 paper size.

Excellent quality and value C3 / A3 board backed envelopes for A3 paper, C4 / A4 board backed envelopes for A4 paper, C5 PiP board backed envelopes allow senders to reduce the original C5 size to make savings on Royal Mail’s postal charges, qualifying as ‘Standard Letters’. C5 Plus sizes are treated as Large Letters and cost a little more when you post out. Our ‘C6 Classic’ Board Backed Envelopes / Hard Back Envelopes are a traditional product for an A6 paper size & our slightly oversized C6 are for postcards & for use by stamp collectors & stamp dealers.

Our quality Board Backed Envelopes come in standard and non-standard sizes, manufactured and stocked for immediate shipping.

Contact us for same day delivery if you have an urgent requirement. Otherwise you can choose a free two day service to most UK addresses or pay a little extra for next day delivery.

If you want to buy board backed envelopes but have any questions about our DEFENDA ENVELOPES before purchasing, feel free to call us during normal office hours. We offer the cheapest board backed envelopes without compromising quality.

See the full range below: