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Postal Boxes

Shop our large range of postal boxes in sizes from small, medium, and large, with Royal Mail large letter boxes, book wrap mailers, and flower boxes available too.

Learn More
Small Postal BoxesSmall Postal Boxes
Medium Postal BoxesMedium Postal Boxes
Large Postal BoxesLarge Postal Boxes
Postal Boxes to fit A4Postal Boxes to fit A4
Postal Boxes to fit A5Postal Boxes to fit A5
Postal Boxes to fit A6Postal Boxes to fit A6
Flat Packed Postal BoxesFlat Packed Postal Boxes
Rigid Two-Piece Postal BoxesRigid Two-Piece Postal Boxes
Pizza Box Style Postal BoxesPizza Box Style Postal Boxes
Book Wrap MailersBook Wrap Mailers
Packing ItemsPacking Items
White Postal BoxesWhite Postal Boxes
Black Postal BoxesBlack Postal Boxes
Kraft Postal BoxesKraft Postal Boxes
Recycled Cardboard EnvelopesRecycled Cardboard Envelopes
Recycled Postal BagsRecycled Postal Bags
Flexi-Hex® Postal Sleeves Flexi-Hex® Postal Sleeves
Recycled Jiffy BagsRecycled Jiffy Bags
Subscription Postal BoxesSubscription Postal Boxes
Flower BoxesFlower Boxes
Paper Mailing BagsPaper Mailing Bags
Postal Boxes with Coloured LiningPostal Boxes with Coloured Lining
Royal Mail Large Letter BoxesRoyal Mail Large Letter Boxes

147 products

88 of 147 results

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  1. Rigid 2 Piece Rectangular Postal Box | Gift Box Kraft Brown Kraft Rigid 2-Piece Postal Box / Gift Box 152mm length
    Brand Online Brown Kraft Rigid 2-Piece Postal Box / Gift Box 152mm length
    RMKR8N 152 x 115 x 50mm
    From £1.79£1.49
    £2.50 £2.08
  2. Rigid 2 Piece Rectangular Postal Box | Gift Box Kraft Brown Kraft Rigid 2-Piece Postal Box / Gift Box 178mm length
    Brand Online Brown Kraft Rigid 2-Piece Postal Box / Gift Box 178mm length
    RMKR6B 178 x 105 x 64mm
    From £1.60£1.33
    £1.92 £1.60
  3. Small Rigid 2 Piece Postal Box | Gift Box Kraft Brown Kraft Rigid 2-Piece Postal Box / Gift Box 105mm length
    Brand Online Brown Kraft Rigid 2-Piece Postal Box / Gift Box 105mm length
    RMKR01 105 x 70 x 40mm
    From £1.50£1.25
    £1.96 £1.63
  4. Small Rigid 2 Piece Postal Box | Gift Box Kraft Brown Kraft Rigid 2-Piece Postal Box / Gift Box 120mm length
    Brand Online Brown Kraft Rigid 2-Piece Postal Box / Gift Box 120mm length
    RMKR02 120 x 80 x 45mm
    From £1.40£1.17
    £2.08 £1.73
  5. Brown Rigid Two-Piece Long Shallow Postal Box Kraft Brown Kraft Rigid 2-Piece Postal Box / Gift Box 206mm length
    Brand Online Brown Kraft Rigid 2-Piece Postal Box / Gift Box 206mm length
    RMKR8B 206 x 90 x 26mm
    From £1.38£1.15
    £1.72 £1.43
  6. Rigid 2 Piece Postal Boxes White Rigid 2-Piece Postal Box / Gift Box 120mm length
    Brand meNo Insert White Rigid 2-Piece Postal Box / Gift Box 120mm length
    RMWH02 120 x 80 x 45mm
    £2.08 £1.73
  7. White Rigid 2 Piece Postal Box / Gift Box White Rigid 2-Piece Postal Box / Gift Box 105mm length
    Brand meNo Insert White Rigid 2-Piece Postal Box / Gift Box 105mm length
    RMWH01 105 x 70 x 40mm
    £1.96 £1.63
  8. Black Rigid 2 Piece Postal Box / Gift Box 105mm length Black Rigid 2-Piece Postal Box / Gift Box 105mm length
    Brand meNo Insert Black Rigid 2-Piece Postal Box / Gift Box 105mm length
    RMBL01 105 x 70 x 40mm
    £1.96 £1.63
  9. Digital Lavender Rigid 2 Piece Postal Box / Gift Box 105mm length Digital Lavender Rigid 2-Piece Postal Box / Gift Box 105mm length
    Brand meNo Insert Digital Lavender Rigid 2-Piece Postal Box / Gift Box 105mm length
    RMLV01 105 x 70 x 40mm
    £1.96 £1.63
  10. Black Rigid 2 Piece Postal Box / Gift Box Black Rigid 2-Piece Postal Box / Gift Box 120mm length
    Brand meNo Insert Black Rigid 2-Piece Postal Box / Gift Box 120mm length
    RMBL02 120 x 80 x 45mm
    £2.08 £1.73
  11. Digital Lavender Rigid 2 Piece Postal Box / Gift box 120mm Digital Lavender Rigid 2-Piece Postal Box / Gift Box 120mm length
    Brand meNo Insert Digital Lavender Rigid 2-Piece Postal Box / Gift Box 120mm length
    RMLV02 120 x 80 x 45mm
    £2.08 £1.73
  12. White Slim A6 Corrugated Mailing Box
    Brand Online White Slim A6 Corrugated Mailing Box
    FMA6WH20 160 x 110 x 20mm
    From £0.29£0.24
    £0.55 £0.46
  13. A5 Slim White Corrugated Mailing Box A5 Slim White Corrugated Mailing Box
    Brand Online A5 Slim White Corrugated Mailing Box
    FMA5WH20 222 x 160 x 20mm
    From £0.42£0.35
    £0.89 £0.74
  14. Kraft Bottle Postal Box for Mailing Kraft Bottle Postal Box for Mailing
    Kraft Bottle Postal Box for Mailing
    FMKR33 345 x 105 x 105mm
    £0.62 £0.52
  15. A4 Slim White Corrugated Mailing Box
    Brand Online A4 Slim White Corrugated Mailing Box
    FMA4WH20 324 x 230 x 20mm
    From £0.80£0.67
    £1.21 £1.01
  16. White Mailing Box For 320 X 238 X 68mm White White Corrugated Postal Box White Internal
    Brand OnlineNo Insert White Corrugated Postal Box White Internal
    FMWW07 310 x 237 x 62mm
    From £0.98£0.82
    £1.20 £1.00
  17. Pack of 10 Corrugated Kraft Box - 250 x 150 x 100mm Pack of 10 E-Commerce Corrugated Kraft Boxes 205mm length
    Pack of 10 E-Commerce Corrugated Kraft Boxes 205mm length
    W2ASCEB1 205 x 150 x 100mm
    £14.03 £11.69
  18. Corrugated Kraft Box in a pack of 10 - 450 x 300 x 150mm Pack of 10 E-Commerce Corrugated Kraft Boxes 450mm length
    Pack of 10 E-Commerce Corrugated Kraft Boxes 450mm length
    W2ASCEB3 450 x 300 x 150mm
    £29.92 £24.93
  19. Pack of 25 Square Single Wall Kraft Packing Boxes 155mm Pack of 25 Square Single Wall Kraft Packing Boxes 155mm
    Pack of 25 Square Single Wall Kraft Packing Boxes 155mm
    W2ASCV060606 155 x 155 x 155mm
    £15.23 £12.69
  20. Pack of 35 A4 Book Mailer Kraft Wraps
    Free Shipping Pack of 35 A4 Book Mailer Kraft Wraps
    W2ASCMP00C4 310 x 250 x 70mm
    £36.12 £30.10
  21. Pack of 50 Single Wall White Packing Boxes
    Pack of 50 Single Wall White Packing Boxes
    W2ASCV030306 76 x 76 x 152mm
    £14.82 £12.35
  22. Pack of 50 Small White Corrugated Postal Boxes 95mm length Pack of 50 Small White Corrugated Postal Boxes 95mm length
    No Insert Pack of 50 Small White Corrugated Postal Boxes 95mm length
    W2ASCDB1 95 x 75 x 38mm
    £13.60 £11.33
  23. Pack of 50 Small White Corrugated Postal Boxes 120mm length Pack of 50 Small White Corrugated Postal Boxes 120mm length
    No Insert Pack of 50 Small White Corrugated Postal Boxes 120mm length
    W2ASCDB2 120 x 120 x 52mm
    £16.86 £14.05
  24. Pack of 50 Medium White Corrugated Postal Boxes 152mm length Pack of 50 Medium White Corrugated Postal Boxes 152mm length
    No Insert Pack of 50 Medium White Corrugated Postal Boxes 152mm length
    W2ASCDB26 152 x 100 x 70mm
    £17.68 £14.73
  25. Pack of 50 Medium White Corrugated Postal Boxes 232mm length Pack of 50 Medium White Corrugated Postal Boxes 232mm length
    No Insert Pack of 50 Medium White Corrugated Postal Boxes 232mm length
    W2ASCDB34 232 x 158 x 95mm
    £36.43 £30.36
  26. Pack of 50 Medium White Corrugated Postal Boxes 240mm length Pack of 50 Medium White Corrugated Postal Boxes 240mm length
    No Insert Pack of 50 Medium White Corrugated Postal Boxes 240mm length
    W2ASCDB8 240 x 165 x 70mm
    £25.84 £21.53
  27. Pack of 50 Medium White Corrugated Postal Boxes 305mm length Pack of 50 Medium White Corrugated Postal Boxes 305mm length
    No Insert Pack of 50 Medium White Corrugated Postal Boxes 305mm length
    W2ASCDB45 305 x 213 x 50mm
    £33.18 £27.65
  28. Pack of 50 Medium White Corrugated Postal Boxes 207mm length Pack of 50 Medium White Corrugated Postal Boxes 207mm length
    No Insert Pack of 50 Medium White Corrugated Postal Boxes 207mm length
    W2ASCDB6 207 x 139 x 90mm
    £29.10 £24.25
  29. Pack of 50 Medium White Corrugated Postal Boxes 220mm length Pack of 50 Medium White Corrugated Postal Boxes 220mm length
    No Insert Pack of 50 Medium White Corrugated Postal Boxes 220mm length
    W2ASCDB7 220 x 148 x 60mm
    £43.37 £36.14
  30. Pack of 50 Medium White Corrugated Postal Boxes 232mm length Pack of 50 Medium White Corrugated Postal Boxes 232mm length
    No Insert Pack of 50 Medium White Corrugated Postal Boxes 232mm length
    W2ASCDB40 232 x 158 x 55mm
    £25.84 £21.53
  31. Pack of 50 Medium White Corrgated Postal Box - 305 x 213 x 78mm Pack of 50 Medium White Corrugated Postal Boxes 305mm length
    No Insert Pack of 50 Medium White Corrugated Postal Boxes 305mm length
    W2ASCDB11 305 x 213 x 78mm
    £42.96 £35.80
  32. Kraft Earring Holder with earrings Earring Holder Kraft Mailer
    20% Off EMKR65 (Use code: TOPPICKS20)Brand me Earring Holder Kraft Mailer
    EMKR65 65 x 65 x 12mm
    £0.25 £0.21
  33. Earrings shown in white earring holder Earring Holder White Mailer
    20% Off EMWH65 (Use code: TOPPICKS20)Brand me Earring Holder White Mailer
    EMWH65 65 x 65 x 12mm
    £0.25 £0.21
  34. Large Kraft Recycled Cardboard Envelopes Large Kraft Recycled Cardboard Envelope
    Large Kraft Recycled Cardboard Envelope
    CMKR31 310 x 209 x 37mm
    From £0.67£0.56
    £0.80 £0.67
  35. Small Kraft Recycled Cardboard Envelope Small Kraft Recycled Cardboard Envelope
    Small Kraft Recycled Cardboard Envelope
    CMKR19 195 x 140 x 37mm
    From £0.42£0.35
    £0.52 £0.43
  36. Kraft Paper Self-Adhesive Tape 50 metres x 50mm Kraft Paper Self-Adhesive Tape 50 metres x 50mm
    Bestseller Kraft Paper Self-Adhesive Tape 50 metres x 50mm
    TAPA50 50m x 50mm
    £2.58 £2.15
  37. Small Kraft Paper Padded Postal Bag (Mailing Bag) open Small Kraft Paper Padded Postal Bag (Mailing Bag)
    Small Kraft Paper Padded Postal Bag (Mailing Bag)
    MBKR02 195 x 280mm
    From £0.35£0.29
    £0.47 £0.39
  38. Medium Kraft Paper Padded Postal Bag (Mailing Bag) open Medium Kraft Paper Padded Postal Bag (Mailing Bag)
    Medium Kraft Paper Padded Postal Bag (Mailing Bag)
    MBKR04 225 x 343mm
    From £0.42£0.35
    £0.56 £0.47
  39. Large Kraft Paper Padded Postal Bag (Mailing Bag) open Large Kraft Paper Padded Postal Bag (Mailing Bags)
    Large Kraft Paper Padded Postal Bag (Mailing Bags)
    MBKR06 295 x 458mm
    From £0.76£0.63
    £1.01 £0.84
  40. Medium Kraft Paper Postal Bag (Mailing Bag) Medium Kraft Paper Postal Bag (Mailing Bag)
    Medium Kraft Paper Postal Bag (Mailing Bag)
    MBKRME 325 x 500mm
    From £0.31£0.26
    £0.40 £0.33
  41. Small Kraft Paper Mailing Bag Small Kraft Paper Postal Bag (Mailing Bag)
    Small Kraft Paper Postal Bag (Mailing Bag)
    MBKRSM 280 x 375mm
    From £0.26£0.22
    £0.35 £0.29
  42. Flexi-Hex bottle protector compressed Flexi-Hex® Kraft Sleeve for Fragile Products
    Flexi-Hex® Kraft Sleeve for Fragile Products
    FHKR01 300 x 25 x 35mm
    From £0.83£0.69
    £1.03 £0.86
  43. Flexi-Hex protector 200mm Flexi-Hex® Air Sleeve in Kraft - 200mm
    Brand me Flexi-Hex® Air Sleeve in Kraft - 200mm
    AIKR20 200 x 25 x 7mm
    From £0.58£0.48
    £0.71 £0.59
  44. Flexi-Hex Bottle protector 250mm Flexi-Hex® Air Sleeve in Kraft - 250mm
    Brand me Flexi-Hex® Air Sleeve in Kraft - 250mm
    AIKR25 250 x 25 x 7mm
    From £0.77£0.64
    £0.90 £0.75

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Shop our large range of postal boxes in sizes from small, medium, and large, with Royal Mail large letter boxes, book wrap mailers, and flower boxes available too.

Postal Boxes - Recyclable, Sustainable & Ready to Mail

At Tiny Box Company, we offer a wide range of postal boxes and mailing boxes for everything from personal parcels to high-volume business orders. Our collection includes flat pack and rigid styles in sizes including A6, A5, and A4 - including Royal Mail large letter boxes.

Made from eco-friendly materials like corrugated cardboard, our boxes are strong, secure, and sustainable - ideal for eco-conscious individuals and businesses alike. Use them to ship everything from photographs and stationery to artwork, gifts, or corporate brochures.

What's corrugated cardboard? Quite simply, it's made up of three layers of board - two sheets covering the outside and one in the middle that has a rippled shape. This is what makes it so strong, which is why it's often used for mailing!

Read more here on selecting the perfect material for your gift/postal boxes.

Brighten up your packaging with colourful A6 mailing boxes or go classic with kraft brown and white finishes. For delicate items like books or flowers, explore our kraft mailers and flower letterboxes with circular hole cutouts.

They’re not just for shipping - our boxes are also great for storage, gift presentation, or keeping handmade items protected. And when space is limited, our flat pack options fold down neatly. Need some help choosing the right postal box for your business? Check out our guide here!

Add your logo with digital printing to make a lasting impression. Whether you need a few or are ordering in wholesale quantities, we offer flexible options for every business size.

Finish the look with our eco-friendly postal bags, kraft tape, shredded paper filler, and more packaging accessories - all designed to keep your products safe and stylish.

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