Royal Mail Maximisers

Our range of Royal Mail Large Letter and Small Parcel mailers have been designed specifically to give the maximum delivery space, yet still fall within the Royal Mailer large letter and small parcel size.

What are royal mail large letter and small parcel sizes?

  • Royal mail parcel size 450 x 350 x 160mm
  • Large Letter size 353 x 250 x 25mm

Our range of Royal Mail Small Parcel and Large Letter compliant mailers have been tried, tested and found to save time and money by the Internet’s biggest retailers…

  • A-CD - a CD sized envelope for mailing out CDs

    A-CD envelope

    180 x 164 x 0-30 mm
    from £0.09 Each (ex VAT)

    Looking for quality cardboard CD envelopes? The A-CD envelopes are Amazon style CD mailers that provide the most cost-effective protection for your...

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  • A-LTR - a letter sized envelope for Royal Mail

    A-LTR envelope

    239 x 164 x 0-30 mm
    from £0.13 Each (ex VAT)

    Maximise and save on Royal Mail 'Letters' postal tariff! The A-LTR small cardboard envelope is perfectly sized to fit through the Royal Mail "Lette...

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  • A3 Envelope

    A3 Envelope

    352 x 249 x 0-30 mm
    from £0.21 Each (ex VAT)

    Looking for a large letter envelope to maximise the Royal Mail large letter size limit of 353 x 250 x 25mm? The Lil A3 is a large letter mailer fea...

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  • Lil Letterbox - A5max Large Letter

    Lil Letterbox - A5max Large Letter

    215 x 160 x 22 mm
    from £0.22 Each (ex VAT)

    Brown in colour & guaranteed not to let you down, the Lil A5max Large Letter‚cardboard box is made from single wall corrugated kraft cardboard ...

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  • Lil Letterbox AELL03 max Large letter

    Lil Letterbox AELL03 max Large letter

    345 x 245 x 22 mm
    from £0.34 Each (ex VAT)

    Brown in colour & guaranteed not to let you down, the Lil AELL03 max Large letter cardboard box is made from single wall corrugated kraft cardb...

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  • F3 Flatpack Large Letter Size

    F3 Flatpack Large Letter Size

    352 x 249 mm
    from £0.36 Each (ex VAT)

    353 x 250 x 25mm is the maximum you can go to within Royal Mail Large Letter size limit. Royal Mail Large Letter size mailers! F3 large letter flat...

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  • A5 Envelope

    A5 Envelope

    448 x 328 x 0-30 mm
    from £0.40 Each (ex VAT)

    Looking for small parcel envelopes to maximise the Royal Mail small parcel size limit of 450 x 350 x 160mm? The Lil A5 envelope is a small parcel-s...

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  • C3 Bukwrap

    C3 Bukwrap

    311 x 240 x 0-50 mm
    from £0.43 Each (ex VAT)

    Looking for large letter book wraps to maximise the Royal Mail large letter size limit of 353 x 250 x 25mm? The C3 bukwrap is a sturdy, rigid cardb...

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  • F5 Flatpack

    F5 Flatpack

    445 x 325 mm
    from £0.54 Each (ex VAT)

    Looking for small parcel cardboard envelopes‚to maximise the Royal Mail small parcel size limit of 450 x 350 x 160mm? The Lil F5 small parcel flatp...

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  • E5-SP Royal Mail Small Parcel Cardboard Box

    E5-SP Royal Mail Small Parcel Cardboard Box

    445 x 345 x 155 mm
    from £0.62 Each (ex VAT)

    Looking for postal packaging boxes to maximise the Royal Mail small parcel size limit of 450 x 350 x 160mm? The E5-SP cardboard box is seriously st...

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