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Kraft Brown Flat Packed Postal Boxes

Our flat-pack postal boxes are available in various sizes and styles, including classic boxes, pizza-style boxes, and book wrap mailers, perfect for all your shipping needs.
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56 products
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56 products
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Black 1-Piece A5 Corrugated Postal Box Black 1-Piece A5 Corrugated Postal Box
Black 1-Piece A5 Corrugated Postal Box
#FMBLA5 244 x 180 x 55mm
From £1.20£1.44
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Black 1-Piece A6 Corrugated Postal Box Black 1-Piece A6 Corrugated Postal Box
Black 1-Piece A6 Corrugated Postal Box
#FMBLA6 178 x 131 x 55mm
From £1.02£1.22
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Kraft Brown Double Walled Postal Box for Mailing Deep Magnetic Box Kraft Brown Double Walled Postal Box for Mailing Deep Magnetic Box
Kraft Brown Double Walled Postal Box for Mailing Deep Magnetic Box
#FMKR22EB 300 x 235 x 122mm
From £1.11£1.33
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Black 1-Piece A4 Corrugated Postal Box Black 1-Piece A4 Corrugated Postal Box
Black 1-Piece A4 Corrugated Postal Box
#FMBLA4 322 x 228 x 55mm
From £2.43£2.92
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Kraft 1-Piece A4 Corrugated Postal Box Kraft 1-Piece A4 Corrugated Postal Box
Kraft 1-Piece A4 Corrugated Postal Box
#FMKRA4 322 x 228 x 55mm
From £0.75£0.90
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Kraft Brown Double Walled Postal Box for Mailing Large Magnetic Box Kraft Brown Double Walled Postal Box for Mailing Large Magnetic Box
Kraft Brown Double Walled Postal Box for Mailing Large Magnetic Box
#FMKR40EB 420 x 315 x 116mm
From £1.51£1.81
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Kraft 1-Piece A5 Corrugated Postal Box Kraft 1-Piece A5 Corrugated Postal Box
Kraft 1-Piece A5 Corrugated Postal Box
#FMKRA5 244 x 180 x 55mm
From £0.51£0.61
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Kraft 1-Piece A6 Corrugated Postal Box Kraft 1-Piece A6 Corrugated Postal Box
Kraft 1-Piece A6 Corrugated Postal Box
#FMKRA6 178 x 131 x 55mm
From £0.36£0.43
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Kraft Brown Double Walled Postal Box for Square Magnetic Box Kraft Brown Double Walled Postal Box for Square Magnetic Box
Kraft Brown Double Walled Postal Box for Square Magnetic Box
#FMKR23EB 250 x 245 x 110mm
From £1.04£1.25
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White Flat Packed Micro Corrugated Mug Gift Box White Flat Packed Micro Corrugated Mug Gift Box
White Flat Packed Micro Corrugated Mug Gift Box
#FCWHMU 112 x 112 x 112mm
From £1.32 £1.10
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Kraft Brown Postal Box for Mailing Medium Magnetic Box
Kraft Brown Postal Box for Mailing Medium Magnetic Box
#FMKR16RF 218 x 175 x 90mm
From £0.64£0.77
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Sage Green Deep 1-Piece A6 Mailing Gift Box Sage Green Deep 1-Piece A6 Mailing Gift Box
Sage Green Deep 1-Piece A6 Mailing Gift Box
#FMSGA6 178 x 131 x 55mm
From £1.24 £1.03
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White Corrugated Postal Box 154mm length White Corrugated Postal Box 154mm length
White Corrugated Postal Box 154mm length
#FMWH03 154 x 150 x 60mm
From £0.39£0.47
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Kraft 1-Piece Thin A6 Corrugated Postal Gift Box Kraft 1-Piece Thin A6 Corrugated Postal Gift Box
Kraft 1-Piece Thin A6 Corrugated Postal Gift Box
#FMA6KR22 178 x 131 x 22mm
From £0.30£0.36
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Rose Quartz Deep 1-Piece A6 Mailing Gift Box Rose Quartz Deep 1-Piece A6 Mailing Gift Box
Rose Quartz Deep 1-Piece A6 Mailing Gift Box
#FMRQA6 178 x 131 x 55mm
From £1.24 £1.03
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Black 1-Piece Tabbed Corrugated Postal Box Black 1-Piece Tabbed Corrugated Postal Box
Black 1-Piece Tabbed Corrugated Postal Box
#FMBL07 310 x 237 x 62mm
From £1.92£2.30
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Slim A5 Corrugated Flat Mailing Box Slim A5 Corrugated Flat Mailing Box
Slim A5 Corrugated Flat Mailing Box
#FMA5KR22 238 x 180 x 22mm
From £0.48£0.58
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Pack of 50 Medium White Corrugated Postal Boxes 232mm length Pack of 50 Medium White Corrugated Postal Boxes 232mm length
Pack of 50 Medium White Corrugated Postal Boxes 232mm length
#W2ASCDB34 232 x 158 x 95mm
£57.92 £48.27
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Kraft Flat Packed Micro Corrugated Mug Gift Box Kraft Flat Packed Micro Corrugated Mug Gift Box
Kraft Flat Packed Micro Corrugated Mug Gift Box
#FCKRMU 112 x 112 x 112mm
From £1.32 £1.10
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White Corrugated Postal Box 310mm length White Corrugated Postal Box 310mm length
White Corrugated Postal Box 310mm length
#FMWH07 310 x 237 x 62mm
From £0.49£0.59
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Kraft Brown Double Walled Postal Box for A4 Magnetic Box Kraft Brown Double Walled Postal Box for A4 Magnetic Box
Kraft Brown Double Walled Postal Box for A4 Magnetic Box
#FMKR31EB 330 x 235 x 75mm
From £0.89£1.07
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White Corrugated Postal Box 125mm length White Corrugated Postal Box 125mm length
White Corrugated Postal Box 125mm length
#FMWH02 125 x 103 x 80mm
From £0.39£0.47
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Pack of 50 Medium White Corrugated Postal Boxes 240mm length Pack of 50 Medium White Corrugated Postal Boxes 240mm length
Pack of 50 Medium White Corrugated Postal Boxes 240mm length
#W2ASCDB8 240 x 165 x 70mm
£36.17 £30.14
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Kraft Perforated Wrap Medium Mailing Box with Tear Strip Kraft Perforated Wrap Medium Mailing Box with Tear Strip
Kraft Perforated Wrap Medium Mailing Box with Tear Strip
#FMKR58 317 x 211 x 67mm
From £0.60£0.72
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Lilac Deep 1-Piece A6 Mailing Gift Box Lilac Deep 1-Piece A6 Mailing Gift Box
Lilac Deep 1-Piece A6 Mailing Gift Box
#FMLIA6 178 x 131 x 55mm
From £1.24 £1.03
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Reversible Flower Letterbox Postal Mailing Box Reversible Flower Letterbox Postal Mailing Box
Reversible Flower Letterbox Postal Mailing Box
#FLKR33 590 x 175 x 34mm
£1.09 £0.91
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Kraft Perforated Wrap Large Mailing Box with Tear Strip Kraft Perforated Wrap Large Mailing Box with Tear Strip
Kraft Perforated Wrap Large Mailing Box with Tear Strip
#FMKR64 347 x 255 x 47mm
From £0.83£1.00
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White Corrugated Postal Box 178mm length White Corrugated Postal Box 178mm length
White Corrugated Postal Box 178mm length
#FMWH08 178 x 144 x 56mm
From £0.43£0.52
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Slim A4 Corrugated Flat Mailing Box Slim A4 Corrugated Flat Mailing Box
Slim A4 Corrugated Flat Mailing Box
#FMA4KR22 322 x 228 x 22mm
From £0.70£0.84
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Kraft Perforated Wrap Small Mailing Box with Tear Strip Kraft Perforated Wrap Small Mailing Box with Tear Strip
Kraft Perforated Wrap Small Mailing Box with Tear Strip
#FMKR54 257 x 165 x 45mm
From £0.39£0.47
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Pack of 50 Medium White Corrugated Postal Boxes 152mm length Pack of 50 Medium White Corrugated Postal Boxes 152mm length
Pack of 50 Medium White Corrugated Postal Boxes 152mm length
#W2ASCDB26 152 x 100 x 70mm
£21.74 £18.12
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Pack of 50 Small White Corrugated Postal Boxes 120mm length Pack of 50 Small White Corrugated Postal Boxes 120mm length
Pack of 50 Small White Corrugated Postal Boxes 120mm length
#W2ASCDB2 120 x 120 x 52mm
£24.44 £20.37
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Kraft Bottle Postal Box for Mailing Kraft Bottle Postal Box for Mailing
Kraft Bottle Postal Box for Mailing
#FMKR33RF 345 x 105 x 105mm
From £0.49£0.59
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Pack of 10 E-Commerce Corrugated Kraft Boxes 450mm length 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
£50.86 £42.38
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Kraft Brown Postal Box for Mailing Small Magnetic Box
Kraft Brown Postal Box for Mailing Small Magnetic Box
#FMKR12RF 160 x 135 x 78mm
From £0.52£0.62
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Pack of 10 E-Commerce Corrugated Kraft Boxes 205mm length 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
£23.57 £19.64
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White Corrugated Postal Box 103mm length White Corrugated Postal Box 103mm length
White Corrugated Postal Box 103mm length
#FMWH01 103 x 85 x 60mm
From £0.34£0.41
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Pack of 50 Medium White Corrugated Postal Boxes 220mm length Pack of 50 Medium White Corrugated Postal Boxes 220mm length
Pack of 50 Medium White Corrugated Postal Boxes 220mm length
#W2ASCDB7 220 x 148 x 60mm
£45.54 £37.95
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Black 1-Piece Matchbox Corrugated Postal Box Black 1-Piece Matchbox Corrugated Postal Box
Black 1-Piece Matchbox Corrugated Postal Box
#FMBL11 139 x 139 x 20mm
From £0.78£0.94
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Pack of 50 Medium White Corrugated Postal Boxes 207mm length Pack of 50 Medium White Corrugated Postal Boxes 207mm length
Pack of 50 Medium White Corrugated Postal Boxes 207mm length
#W2ASCDB6 207 x 139 x 90mm
£41.33 £34.44
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White Corrugated Postal Box White Internal White Corrugated Postal Box White Internal
White Corrugated Postal Box White Internal
#FMWW07 310 x 237 x 62mm
From £0.86£1.03
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Sage Green 1-Piece A6 Mailing Gift Box Sage Green 1-Piece A6 Mailing Gift Box
Sage Green 1-Piece A6 Mailing Gift Box
#FMA6SG22 178 x 131 x 22mm
From £0.36 £0.30 £0.66
£0.36
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Pack of 50 Medium White Corrugated Postal Boxes 305mm length Pack of 50 Medium White Corrugated Postal Boxes 305mm length
Pack of 50 Medium White Corrugated Postal Boxes 305mm length
#W2ASCDB45 305 x 213 x 50mm
£57.40 £47.83
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Slim 1-Piece Flat Black Corrugated Postal Box Slim 1-Piece Flat Black Corrugated Postal Box
Slim 1-Piece Flat Black Corrugated Postal Box
#FMBL09 322 x 180 x 20mm
From £0.83£1.00
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Showing 44 of 56 products

What’s a flat-pack box?

A flat-pack box is packaging that arrives flat and easily folds into shape. Unlike rigid boxes, flat-pack boxes save storage space and shipping costs by being compact until needed. 

Discover our range of rigid two-piece postal boxes here, also ideal for premium gift packaging.

Key benefits:

Space-saving: Store flat and assemble only when needed, ideal for businesses managing limited storage space. 

Easy assembly: Quick-fold designs with self-locking tabs - no tape or glue required.

Durable protection: Strong corrugated cardboard ensures safe shipping for delicate items. 

Customisable: Easily branded with logos or custom designs, enhancing your customer's unboxing experience.

Common uses:

E-commerce shipping: Secure, professional packaging for online retailers.

Gifts & subscriptions: Durable and stylish for a memorable unboxing experience. 

Storage & organisation: Convenient for storing documents, books, and supplies at home or in the office.

Explore our complete selection of postal boxes here!

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