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 envelope

    A-CD envelope

    180 x 164 x 0-30 mm

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

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  • Lil A5 max large letter - Letterbox packaging Royal Mail Large Letter PIP pricing in proportion

    Lil Letterbox - A5max Large Letter

    215 x 160 x 22 mm

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

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  • A-LTR envelope

    A-LTR envelope

    239 x 164 x 0-30 mm

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

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  • Lil Letterbox AELL03 max Large letter

    Lil Letterbox AELL03 max Large letter

    345 x 245 x 22 mm

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

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  • F3 Flatpack

    F3 Flatpack

    352 x 249 mm

    F3 large letter corrugated envelopes are for shipping A4 brochures, calendars and DVDs. These are large letter cardboard envelopes. If you're using...

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  • A5 Envelope

    A5 Envelope

    448 x 328 x 0-30 mm

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

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  • A3 Envelope

    A3 Envelope

    352 x 249 x 0-30 mm

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

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  • C3 Bukwrap

    C3 Bukwrap

    311 x 240 x 0-50 mm

    The C3 bukwrap is a sturdy, rigid cardboard protective package specifically designed to protect a variety of common book sizes, especially referenc...

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  • F5 Flatpack

    F5 Flatpack

    445 x 325 mm

    Looking for small parcel cardboard envelopes to maximise the small parcel size limit of 450 x 350 x 160mm?  The Lil F5 small parcel flatpacks are A...

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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

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

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