F3 Flatpack Large Letter Size

352 x 249 mm
In Stock

Unit price (each) excl. Taxes

Pack: £0.48 | Part-pallet: £0.44 | Pallet: £0.355

Look no further for large letter flatpacks, the Lil F3 flatpack ensures the cheapest postal tariff every time. Maximising the large letter tariff limit and reducing your postal costs, these large letter cardboard envelopes are perfect for A4 sized brochures and other items. These large letter flatpacks are a seriously strong & professional packaging option for your e-commerce business. Fast to pack, tamper proof protection! For all Royal Mail Large Letter size mailers and small parcel postal tariff maximisers click here.

Each (ex VAT)
£14.40 Each (ex VAT)

Please select "Pack", "Part-Pallet" or "Pallet" before selecting how many to add to basket.

Select "Pallet" and save up to 46% on certain lines. Click here to see how.

(Total items)
Fast & Free Delivery

spend £75 (ex VAT)

Same Day Dispatch

Order by 1pm

Product Description

353 x 250 x 25mm is the maximum size for the Royal Mail's Large Letter size limit.

Royal Mail Large Letter size mailers!

F3 large letter flatpacks are for shipping A4 brochures, calendars and DVDs. These are large letter cardboard envelopes.  Are you looking for tough flat mailers to maximise the Royal Mail's large letter limit?  You've come to the right place! Alternatively, if you're looking for something with more capacity, be sure to check out our C3 book wrap large letter postal wrap.

For all other Royal Mail Large Letter size mailers and small parcel postal tariff maximisers click here.

If you're using stiffeners, void-fill or airbags in your packaging, there is usually a better way to package what you're sending.  For large envelope postage, the Lil F3 flatpacks are the best large letter cardboard envelopes, providing heavy-duty packaging for delivering A4 brochures, calendars, DVDs, photos, photo frames, diaries, journals, arts & crafts and more through the postal system.  The F3 is made from 150 gsm 'Kraft' e-flute corrugated board; very stiff, tough stuff.  Every single flatpack in our range uses our leading hot melt peel'n'seal / red tear-strip system for easy sealing and easy opening.  Plus, like all of our postal packaging, they come with green credentials out of the box - 100% recyclable and FSC certified / PEFC approved.  Tough packaging doesn't get better than this!

AusPost and Royal Mail Large Letter mailers are designed for cheap postal tariff mailings.  Our sizes are extensively researched to get the snuggest fit - and lowest cost mailing tariff.

If you're using stiffeners, void-fill or airbags in your packaging, the Lil F3 flatpack is a better way to package what you're sending.  The Lil F3 is the stiffest envelope known to man!

Our tough large letter flatpacks are fast to pack because release paper overhangs the hot melt peel and seal flap.  The hot melt adhesive peel and seal closure provides the best seal (at least twice the strength of standard double sided-tape).

Safe in transit, but easy to open when they arrive. This really is tamper proof packaging.


Your packaging is the first time that your customers physically experience your product.  Getting it right is your chance to make the best first impression; we help you do just that.

With a clear understanding of what you need, we use our knowledge and expertise to guide you towards the most appropriate solutions.  It's about delivering unrivalled service.  Over 98% of our orders are dispatched within 24 hours.

Technical Specifications

  • Colour: Brown kraft
  • Height: 4 mm
  • Height inches: 0.15 inches
  • Length: 249 mm
  • Length inches: 9.8 inches
  • Material type: 150 k e flute corrugated
  • Weight: 79g
  • Width: 352 mm
  • Width inches: 13.9 inches