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Royal Mail Postal Boxes

Royal Mail Postal Boxes

Browse our full range of cardboard postal boxes in the table below. We have a wide range of Royal Mail postal boxes in a variety of sizes to suit any item you need to be posted. Read our handy packaging guide if you need help understanding Royal Mail parcel sizes.

Box Size
(LxWxH)

Image

Product Info

Boxes Per Pack

Price Per box (ex. VAT)

1-11 Packs

12-19 Packs

20+ Packs

1 Pallet

Number of
Boxes

Buy Now

Single Wall Cardboard Box
4 x 4 x 4"
Single Wall Cardboard Box
4 x 4 x 4"

Single Wall Cardboard Box
10.2 x 10.2 x 10.2cm
Single Wall Cardboard Box
10.2 x 10.2 x 10.2cm

Single Wall Cardboard Box
101.6 x 101.6 x 101.6mm
Single Wall Cardboard Box
101.6 x 101.6 x 101.6mm

50

20.4p

19.4p

18.4p

17.4p

Add a pallet
+ -

Single Wall Cardboard Box
4 x 4 x 8"
Single Wall Cardboard Box
4 x 4 x 8"

Single Wall Cardboard Box
10.2 x 10.2 x 20.3cm
Single Wall Cardboard Box
10.2 x 10.2 x 20.3cm

Single Wall Cardboard Box
101.6 x 101.6 x 203.2mm
Single Wall Cardboard Box
101.6 x 101.6 x 203.2mm

50

24.1p

23.1p

22.1p

21.1p

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+ -

Double Wall Cardboard Box
4 x 4 x 13"
Double Wall Cardboard Box
4 x 4 x 13"

Double Wall Cardboard Box
10.2 x 10.2 x 33cm
Double Wall Cardboard Box
10.2 x 10.2 x 33cm

Double Wall Cardboard Box
101.6 x 101.6 x 330.2mm
Double Wall Cardboard Box
101.6 x 101.6 x 330.2mm

15

73.5p

70.2p

66.9p

63.6p

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+ -

Single Wall Cardboard Box
5 x 5 x 2.5"
Single Wall Cardboard Box
5 x 5 x 2.5"

Single Wall Cardboard Box
12.7 x 12.7 x 6.4cm
Single Wall Cardboard Box
12.7 x 12.7 x 6.4cm

Single Wall Cardboard Box
127 x 127 x 63.5mm
Single Wall Cardboard Box
127 x 127 x 63.5mm

50

20.8p

19.8p

18.8p

17.8p

Add a pallet
+ -

Single Wall Subscription Box (Brown)
5.5 x 4.4 x 1.3"
Single Wall Subscription Box (Brown)
5.5 x 4.4 x 1.3"

Single Wall Subscription Box (Brown)
14 x 11.2 x 3.3cm
Single Wall Subscription Box (Brown)
14 x 11.2 x 3.3cm

Single Wall Subscription Box (Brown)
139.7 x 111.8 x 33mm
Single Wall Subscription Box (Brown)
139.7 x 111.8 x 33mm

50

21.5p

20.5p

19.5p

18.5p

Add a pallet
+ -

Single Wall Subscription Box (White)
5.5 x 4.4 x 1.3"
Single Wall Subscription Box (White)
5.5 x 4.4 x 1.3"

Single Wall Subscription Box (White)
14 x 11.2 x 3.3cm
Single Wall Subscription Box (White)
14 x 11.2 x 3.3cm

Single Wall Subscription Box (White)
139.7 x 111.8 x 33mm
Single Wall Subscription Box (White)
139.7 x 111.8 x 33mm

50

22.2p

21.2p

20.2p

19.2p

Add a pallet
+ -

Single Wall Subscription Box (Brown)
5.5 x 8.8 x 1.3"
Single Wall Subscription Box (Brown)
5.5 x 8.8 x 1.3"

Single Wall Subscription Box (Brown)
14 x 22.4 x 3.3cm
Single Wall Subscription Box (Brown)
14 x 22.4 x 3.3cm

Single Wall Subscription Box (Brown)
139.7 x 223.5 x 33mm
Single Wall Subscription Box (Brown)
139.7 x 223.5 x 33mm

50

28.4p

27.4p

26.4p

25.4p

Add a pallet
+ -

Single Wall Subscription Box (White)
5.5 x 8.8 x 1.3"
Single Wall Subscription Box (White)
5.5 x 8.8 x 1.3"

Single Wall Subscription Box (White)
14 x 22.4 x 3.3cm
Single Wall Subscription Box (White)
14 x 22.4 x 3.3cm

Single Wall Subscription Box (White)
139.7 x 223.5 x 33mm
Single Wall Subscription Box (White)
139.7 x 223.5 x 33mm

50

29.6p

28.6p

27.6p

 
+ -

Single Wall Cardboard Box
6 x 4 x 3"
Single Wall Cardboard Box
6 x 4 x 3"

Single Wall Cardboard Box
15.2 x 10.2 x 7.6cm
Single Wall Cardboard Box
15.2 x 10.2 x 7.6cm

Single Wall Cardboard Box
152.4 x 101.6 x 76.2mm
Single Wall Cardboard Box
152.4 x 101.6 x 76.2mm

50

26.2p

25.2p

24.2p

 
+ -

Double Wall Cardboard Box
6 x 4 x 4"
Double Wall Cardboard Box
6 x 4 x 4"

Double Wall Cardboard Box
15.2 x 10.2 x 10.2cm
Double Wall Cardboard Box
15.2 x 10.2 x 10.2cm

Double Wall Cardboard Box
152.4 x 101.6 x 101.6mm
Double Wall Cardboard Box
152.4 x 101.6 x 101.6mm

15

39.5p

35.9p

33.9p

 
+ -

Single Wall Cardboard Box
6 x 4 x 4"
Single Wall Cardboard Box
6 x 4 x 4"

Single Wall Cardboard Box
15.2 x 10.2 x 10.2cm
Single Wall Cardboard Box
15.2 x 10.2 x 10.2cm

Single Wall Cardboard Box
152.4 x 101.6 x 101.6mm
Single Wall Cardboard Box
152.4 x 101.6 x 101.6mm

50

21.7p

20.7p

19.7p

 
+ -

Double Wall Cardboard Box
6 x 5 x 4"
Double Wall Cardboard Box
6 x 5 x 4"

Double Wall Cardboard Box
15.2 x 12.7 x 10.2cm
Double Wall Cardboard Box
15.2 x 12.7 x 10.2cm

Double Wall Cardboard Box
152.4 x 127 x 101.6mm
Double Wall Cardboard Box
152.4 x 127 x 101.6mm

15

62p

58.7p

55.3p

+ -

Single Wall Cardboard Box
6 x 5 x 4"
Single Wall Cardboard Box
6 x 5 x 4"

Single Wall Cardboard Box
15.2 x 12.7 x 10.2cm
Single Wall Cardboard Box
15.2 x 12.7 x 10.2cm

Single Wall Cardboard Box
152.4 x 127 x 101.6mm
Single Wall Cardboard Box
152.4 x 127 x 101.6mm

50

22p

21p

20p

+ -

Single Wall Cardboard Box
6 x 6 x 6"
Single Wall Cardboard Box
6 x 6 x 6"

Single Wall Cardboard Box
15.2 x 15.2 x 15.2cm
Single Wall Cardboard Box
15.2 x 15.2 x 15.2cm

Single Wall Cardboard Box
152.4 x 152.4 x 152.4mm
Single Wall Cardboard Box
152.4 x 152.4 x 152.4mm

50

26.6p

25.6p

24.6p

23.6p

Add a pallet
+ -

Double Wall Cardboard Box
7 x 5 x 2.5"
Double Wall Cardboard Box
7 x 5 x 2.5"

Double Wall Cardboard Box
17.8 x 12.7 x 6.4cm
Double Wall Cardboard Box
17.8 x 12.7 x 6.4cm

Double Wall Cardboard Box
177.8 x 127 x 63.5mm
Double Wall Cardboard Box
177.8 x 127 x 63.5mm

15

46.9p

43.5p

40p

37.9p

Add a pallet
+ -

Single Wall Cardboard Box
7 x 5 x 2.5"
Single Wall Cardboard Box
7 x 5 x 2.5"

Single Wall Cardboard Box
17.8 x 12.7 x 6.4cm
Single Wall Cardboard Box
17.8 x 12.7 x 6.4cm

Single Wall Cardboard Box
177.8 x 127 x 63.5mm
Single Wall Cardboard Box
177.8 x 127 x 63.5mm

50

21.4p

20.4p

19.4p

18.4p

Add a pallet
+ -

Single Wall Cardboard Box
7 x 5 x 5"
Single Wall Cardboard Box
7 x 5 x 5"

Single Wall Cardboard Box
17.8 x 12.7 x 12.7cm
Single Wall Cardboard Box
17.8 x 12.7 x 12.7cm

Single Wall Cardboard Box
177.8 x 127 x 127mm
Single Wall Cardboard Box
177.8 x 127 x 127mm

50

23.6p

22.6p

21.6p

20.6p

Add a pallet
+ -

Single Wall Cardboard Box
7 x 7 x 7"
Single Wall Cardboard Box
7 x 7 x 7"

Single Wall Cardboard Box
17.8 x 17.8 x 17.8cm
Single Wall Cardboard Box
17.8 x 17.8 x 17.8cm

Single Wall Cardboard Box
177.8 x 177.8 x 177.8mm
Single Wall Cardboard Box
177.8 x 177.8 x 177.8mm

25

35.9p

34.9p

34.2p

 
+ -

Single Wall Cardboard Box
7 x 7 x 10"
Single Wall Cardboard Box
7 x 7 x 10"

Single Wall Cardboard Box
17.8 x 17.8 x 25.4cm
Single Wall Cardboard Box
17.8 x 17.8 x 25.4cm

Single Wall Cardboard Box
177.8 x 177.8 x 254mm
Single Wall Cardboard Box
177.8 x 177.8 x 254mm

25

38p

33.9p

33p

 
+ -

Single Wall Cardboard Box
8 x 6 x 2"
Single Wall Cardboard Box
8 x 6 x 2"

Single Wall Cardboard Box
20.3 x 15.2 x 5.1cm
Single Wall Cardboard Box
20.3 x 15.2 x 5.1cm

Single Wall Cardboard Box
203.2 x 152.4 x 50.8mm
Single Wall Cardboard Box
203.2 x 152.4 x 50.8mm

25

34.5p

32.5p

30.5p

28.5p

Add a pallet
+ -

Double Wall Cardboard Box
8 x 6 x 4"
Double Wall Cardboard Box
8 x 6 x 4"

Double Wall Cardboard Box
20.3 x 15.2 x 10.2cm
Double Wall Cardboard Box
20.3 x 15.2 x 10.2cm

Double Wall Cardboard Box
203.2 x 152.4 x 101.6mm
Double Wall Cardboard Box
203.2 x 152.4 x 101.6mm

15

73.1p

69.7p

66.4p

63.1p

Add a pallet
+ -

Single Wall Cardboard Box
8 x 8 x 6"
Single Wall Cardboard Box
8 x 8 x 6"

Single Wall Cardboard Box
20.3 x 20.3 x 15.2cm
Single Wall Cardboard Box
20.3 x 20.3 x 15.2cm

Single Wall Cardboard Box
203.2 x 203.2 x 152.4mm
Single Wall Cardboard Box
203.2 x 203.2 x 152.4mm

25

33.9p

32.8p

31.9p

 
+ -

Single Wall Cardboard Box
8 x 8 x 8"
Single Wall Cardboard Box
8 x 8 x 8"

Single Wall Cardboard Box
20.3 x 20.3 x 20.3cm
Single Wall Cardboard Box
20.3 x 20.3 x 20.3cm

Single Wall Cardboard Box
203.2 x 203.2 x 203.2mm
Single Wall Cardboard Box
203.2 x 203.2 x 203.2mm

25

34.4p

33.1p

32.2p

29.8p

Add a pallet
+ -

Single Wall Cardboard Box
9 x 6 x 2"
Single Wall Cardboard Box
9 x 6 x 2"

Single Wall Cardboard Box
22.9 x 15.2 x 5.1cm
Single Wall Cardboard Box
22.9 x 15.2 x 5.1cm

Single Wall Cardboard Box
228.6 x 152.4 x 50.8mm
Single Wall Cardboard Box
228.6 x 152.4 x 50.8mm

25

35.2p

33.2p

31.2p

29.2p

Add a pallet
+ -

Double Wall Cardboard Box
9 x 6 x 3"
Double Wall Cardboard Box
9 x 6 x 3"

Double Wall Cardboard Box
22.9 x 15.2 x 7.6cm
Double Wall Cardboard Box
22.9 x 15.2 x 7.6cm

Double Wall Cardboard Box
228.6 x 152.4 x 76.2mm
Double Wall Cardboard Box
228.6 x 152.4 x 76.2mm

15

71.8p

68.5p

65.1p

 
+ -

Double Wall Cardboard Box
9 x 6 x 6"
Double Wall Cardboard Box
9 x 6 x 6"

Double Wall Cardboard Box
22.9 x 15.2 x 15.2cm
Double Wall Cardboard Box
22.9 x 15.2 x 15.2cm

Double Wall Cardboard Box
228.6 x 152.4 x 152.4mm
Double Wall Cardboard Box
228.6 x 152.4 x 152.4mm

15

78.7p

75.4p

72.1p

68.8p

Add a pallet
+ -

Double Wall Cardboard Box
9 x 9 x 6"
Double Wall Cardboard Box
9 x 9 x 6"

Double Wall Cardboard Box
22.9 x 22.9 x 15.2cm
Double Wall Cardboard Box
22.9 x 22.9 x 15.2cm

Double Wall Cardboard Box
228.6 x 228.6 x 152.4mm
Double Wall Cardboard Box
228.6 x 228.6 x 152.4mm

15

78p

75.9p

73.9p

 
+ -

Single Wall Cardboard Box
9 x 9 x 6"
Single Wall Cardboard Box
9 x 9 x 6"

Single Wall Cardboard Box
22.9 x 22.9 x 15.2cm
Single Wall Cardboard Box
22.9 x 22.9 x 15.2cm

Single Wall Cardboard Box
228.6 x 228.6 x 152.4mm
Single Wall Cardboard Box
228.6 x 228.6 x 152.4mm

25

51p

49p

47p

+ -

Single Wall Cardboard Box
9 x 9 x 9"
Single Wall Cardboard Box
9 x 9 x 9"

Single Wall Cardboard Box
22.9 x 22.9 x 22.9cm
Single Wall Cardboard Box
22.9 x 22.9 x 22.9cm

Single Wall Cardboard Box
228.6 x 228.6 x 228.6mm
Single Wall Cardboard Box
228.6 x 228.6 x 228.6mm

25

38.2p

37p

35.8p

 
+ -

C5 Large Letter Postal Box
9 x 6.3 x 0.6"
C5 Large Letter Postal Box
9 x 6.3 x 0.6"

C5 Large Letter Postal Box
22.9 x 15.9 x 1.6cm
C5 Large Letter Postal Box
22.9 x 15.9 x 1.6cm

C5 Large Letter Postal Box
229.1 x 159 x 16mm
C5 Large Letter Postal Box
229.1 x 159 x 16mm

50

24.4p

23.4p

22.4p

21.4p

Add a pallet
+ -

Single Wall Lidded Box
10 x 7 x 3"
Single Wall Lidded Box
10 x 7 x 3"

Single Wall Lidded Box
25.4 x 17.8 x 7.6cm
Single Wall Lidded Box
25.4 x 17.8 x 7.6cm

Single Wall Lidded Box
254 x 177.8 x 76.2mm
Single Wall Lidded Box
254 x 177.8 x 76.2mm

50

52.1p

51.1p

50.1p

50.1p

Add a pallet
+ -

Single Wall Cardboard Box
10 x 10 x 6"
Single Wall Cardboard Box
10 x 10 x 6"

Single Wall Cardboard Box
25.4 x 25.4 x 15.2cm
Single Wall Cardboard Box
25.4 x 25.4 x 15.2cm

Single Wall Cardboard Box
254 x 254 x 152.4mm
Single Wall Cardboard Box
254 x 254 x 152.4mm

25

61.3p

59.3p

57.3p

55.3p

Add a pallet
+ -

Double Wall Cardboard Box
10 x 10 x 10"
Double Wall Cardboard Box
10 x 10 x 10"

Double Wall Cardboard Box
25.4 x 25.4 x 25.4cm
Double Wall Cardboard Box
25.4 x 25.4 x 25.4cm

Double Wall Cardboard Box
254 x 254 x 254mm
Double Wall Cardboard Box
254 x 254 x 254mm

15

£1.04

98p

97.3p

 
+ -

Single Wall Cardboard Box
10 x 10 x 10"
Single Wall Cardboard Box
10 x 10 x 10"

Single Wall Cardboard Box
25.4 x 25.4 x 25.4cm
Single Wall Cardboard Box
25.4 x 25.4 x 25.4cm

Single Wall Cardboard Box
254 x 254 x 254mm
Single Wall Cardboard Box
254 x 254 x 254mm

25

61.1p

59.9p

58.6p

 
+ -

Double Wall Cardboard Box
11 x 11 x 11"
Double Wall Cardboard Box
11 x 11 x 11"

Double Wall Cardboard Box
27.9 x 27.9 x 27.9cm
Double Wall Cardboard Box
27.9 x 27.9 x 27.9cm

Double Wall Cardboard Box
279.4 x 279.4 x 279.4mm
Double Wall Cardboard Box
279.4 x 279.4 x 279.4mm

15

£1.48

£1.44

£1.42

£1.44

Add a pallet
+ -

Single Wall Postal Box With Tape
11.8 x 6.7 x 0.8"
Single Wall Postal Box With Tape
11.8 x 6.7 x 0.8"

Single Wall Postal Box With Tape
30 x 17 x 2.1cm
Single Wall Postal Box With Tape
30 x 17 x 2.1cm

Single Wall Postal Box With Tape
299.7 x 170.2 x 20.8mm
Single Wall Postal Box With Tape
299.7 x 170.2 x 20.8mm

50

47.2p

46.2p

45.2p

44.2p

Add a pallet
+ -

Single Wall Cardboard Box
12 x 9 x 4"
Single Wall Cardboard Box
12 x 9 x 4"

Single Wall Cardboard Box
30.5 x 22.9 x 10.2cm
Single Wall Cardboard Box
30.5 x 22.9 x 10.2cm

Single Wall Cardboard Box
304.8 x 228.6 x 101.6mm
Single Wall Cardboard Box
304.8 x 228.6 x 101.6mm

25

48.9p

46.9p

44.9p

42.9p

Add a pallet
+ -

Single Wall Cardboard Box
12 x 9 x 6"
Single Wall Cardboard Box
12 x 9 x 6"

Single Wall Cardboard Box
30.5 x 22.9 x 15.2cm
Single Wall Cardboard Box
30.5 x 22.9 x 15.2cm

Single Wall Cardboard Box
304.8 x 228.6 x 152.4mm
Single Wall Cardboard Box
304.8 x 228.6 x 152.4mm

25

52.3p

50.3p

48.3p

46.3p

Add a pallet
+ -

Single Wall Cardboard Box
12 x 9 x 9"
Single Wall Cardboard Box
12 x 9 x 9"

Single Wall Cardboard Box
30.5 x 22.9 x 22.9cm
Single Wall Cardboard Box
30.5 x 22.9 x 22.9cm

Single Wall Cardboard Box
304.8 x 228.6 x 228.6mm
Single Wall Cardboard Box
304.8 x 228.6 x 228.6mm

25

68.7p

66.7p

64.7p

62.7p

Add a pallet
+ -

C4 Large Letter Postal Box
12.8 x 8.9 x 0.6"
C4 Large Letter Postal Box
12.8 x 8.9 x 0.6"

C4 Large Letter Postal Box
32.6 x 22.7 x 1.6cm
C4 Large Letter Postal Box
32.6 x 22.7 x 1.6cm

C4 Large Letter Postal Box
325.9 x 227.1 x 16mm
C4 Large Letter Postal Box
325.9 x 227.1 x 16mm

50

34.1p

33.1p

32.1p

31.1p

Add a pallet
+ -

Single Wall Postal Box
13.2 x 7.2 x 0.9"
Single Wall Postal Box
13.2 x 7.2 x 0.9"

Single Wall Postal Box
33.5 x 18.2 x 2.2cm
Single Wall Postal Box
33.5 x 18.2 x 2.2cm

Single Wall Postal Box
335 x 181.9 x 21.8mm
Single Wall Postal Box
335 x 181.9 x 21.8mm

50

37.8p

36.8p

35.8p

 
+ -

Why Buy Cardboard Postal Boxes?

Whether you're a small business, a sole trader or started selling online it’s always handy to have a decent stock of postal packaging boxes close at hand.

From large to small, square to flat we supply a wide range of cardboard postal boxes to suit your business needs. Whether you need to post a small parcel or something larger the right box for you is one click away.

We make all our mailing boxes from high-quality corrugated cardboard, helping ensure your package arrives safely.  If you’re searching for Royal Mail postal boxes, don’t worry as all our cardboard postal boxes are compatible with Royal Mail guidelines.

We sell both single and double wall cardboard postal boxes giving you a wide variety of options to choose from. All our Royal Mail parcel boxes come flat-packed as standard, helping you save on space. 

Use our handy Box Finder if you're having difficulty locating the right boxes for posting. 

Our range of Royal Mail postal boxes includes -

Discounts On Postal Boxes

Looking to buy postal boxes wholesale? If you buy in bulk from us you can take advantage of our amazing discounts.

Next Working Day Delivery

In a rush and looking for post office parcel boxes last minute? Don't worry, we offer next working day delivery as standard. Order before 13:45pm Monday-Thursday for same day despatch. 

Our Cardboard Boxes

Moving house or need other cardboard boxes for shipping for your business? We also supply everything from removal boxes to storage and filing boxes.