Description
Introducing our Small Parcel Size Board Backed Envelopes (449 × 349 mm / 17.6″ × 13.7″) — purpose-designed hard backed envelopes that comply with Royal Mail’s Small Parcel dimensions while still holding large flat items. This listing is for bulk quantities, ideal for high-volume use by print houses, galleries, e-commerce vendors, and businesses needing robust mailers that avoid oversize postal penalties.
Key Features & Specifications
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Envelope dimensions: 449 × 349 mm (17.6″ × 13.7″), large enough to carry A3 / C3 items while still qualifying under many small parcel postal rules.
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Lightweight yet protective build: Approx. 58 g per empty envelope.
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Rigid board core: Built to resist bending or creasing — ensuring your contents remain pristine during transit.
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Bulk packaging options: Available in various batch sizes (e.g. 100, 200, 400, 800, 1,200 units) to suit your mailing volume.
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Postal compliance: Designed with Royal Mail’s size rules in mind to help your mailings stay within Small Parcel standards while still supporting larger flat items.
What Fits Inside & Use Cases
With its generous size and rigid protection, this envelope is ideal for mailing:
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A3 / C3 flat items such as large prints, drawings, posters, plans, or maps
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Multiple A4 sheets or booklets stacked flat
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Large artwork or framed prints (thin or low-profile framing)
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Portfolios, presentation materials, sample boards
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Calendars, folded posters, maps
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Marketing packs or sample kits that must arrive flat and intact
The board backing ensures your contents resist bending or edge damage — even under tough postal handling.
Why Bulk Orders Are Smart
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Lower cost per unit — bulk ordering reduces your average price per envelope
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Consistent supply — ideal for keeping stock on hand for large mailing jobs
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Uniform product quality — every envelope comes with the same hard backed specification
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Operational efficiency — simplifies storage, packing, and dispatch at scale
Benefits to Your Business & End Recipients
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Superior protection: The rigid board core ensures minimal bending or damage in transit.
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Postal cost advantage: By staying within Small Parcel dimensions, you may avoid higher oversize surcharges.
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Professional delivery presentation: Items arrive flat, intact, and premium in appearance.
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High capacity: The large size accommodates big prints or multi-sheet packages.
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Built for volume: Bulk packaging and consistent quality make these ideal for commercial mail operations.
