C4 Large Letter Boxes Sturdy White C4 Letter Mailing Boxes

Ensure your parcels arrive in perfect condition with our C4 white large letter boxes, crafted for excellence and reliability. These C4 boxes are designed from durable single-wall cardboard (1.2 mm thick), with a crisp white exterior and natural brown interior. Measuring an external size of 345 × 240 × 22 mm (C4/A4), they meet large letter qualifications for postal requirements. Ideal for e-commerce, fulfillment, mailing & storage, these C4 letter boxes protect contents while maintaining a professional presentation. Available in bulk quantities at competitive pricing.