EXTRA FLAT POSTAL BOXES
rajapack co uk0800 542 44 28
Freephone
46
• Ideal for : mailing a wide range of flat
products and especially suitable for use
in the e - commerce industry .
• Double reinforced sides : providing
extra protection for your flat items .
• Easily assembles : no need for tape
or glue .
• Quick and secure closure :
with the adhesive strip .
Single wall corrugated board made
from recycled material .
Delivered flat packed .
Sold in packs , priced per box
Designed to fit standard
letterboxes
OUR SPECIALIST ' S ADVICE
Postal product size guide
RAJA ' s huge range of postal packaging means that you can get everything you need to send parcels safely and securely , all in one place .
So whether you ’ re sending products by mail , courier or parcel service , our experts can help you find the right packaging solution .
Large letter Royal Mail postal sizes :
applied to packages that will fit through a standard UK letterbox measuring up to W 250 x L 353 x D 25 mm and up to 750g in weight .
Small parcel Royal Mail postal sizes :
applied to packages with external sizes up to W 350 x L 450 x D 160 mm and up to 2 kg in weight .
Medium parcel Royal Mail postal sizes :
applied to packages with external sizes up to W 460 x L 610 x D 460 mm and up to 20 kg in weight .
Large parcel Royal Mail postal sizes :
if your parcel is over the size or weight of a medium parcel you will need to send it by courier .
Information provided by Royal Mail Group Ltd 2025 .
Extra flat boxes
with top opening
Ideal for large , flat items
White boxes 20 mm height
Brown boxes with adhesive strip 22 23 mm height
Enhanced presentation and easy opening finger hole
Manufactured from high strength E flute with a Kraft paper finish
Seals quickly and securely no need for tape
Opens easily with the tear off strip
Manufactured from single wall recyclable board
recycled
61
%
RECYCLED
RECYCLABLE
61
%
recyclable
Up to
15
off
Ref
L x W x H
internal
mm
format
pack
quantity
£ PER BOX
75 75 125
MFC 334 x 241 x 24 24 large letter 25 1 20 1 08 1 02
Up to
30
off
Ref
L x W x H
internal
mm
mail format
pack
quantity
£ PER BOX
50 50 150 250 300
FLT0 220 x 110 x 22 large letter 10 0 87 0 78 0 73 0 69 0 60
FLT1 218 x 186 x 22 large letter 10 1 49 1 34 1 26 1 19 1 11
FLT3 335 x 245 x 23 large letter 10 1 57 1 41 1 33 1 25 1 09
YOUR BOXES
MADE - TO - MEASURE
CUSTOM PRINTED
AND
See p . 44