Imperial Metric Conversion Chart
What Size Postal Tube Is Best For...?
The below is designed to help your decide which postal tube or mailing tube is best for your particular poster, print or artwork in both imperial or metric measurements.
Our cheapest Postal Tubes / Mailing Tubes prices come as standard but you can select numerous other variables when deciding on the right spiral wound cardboard paper postal tube for your items & to minimise postage costs or the price you pay couriers to send them. As manufacturers that hold an enormous range as stock items, we can also manufacture almost any tube you may require. If you have landed on this page because you are struggling to identify the postal tube most suitable for your goods or are unsure of the size Poster Tubes required for your posters check the metric to imperial mailing tubes chart below.
A quick guide to tubes for standard paper sizes is as follows: A5 postal tubes - 8" or 203mm long, A4 postal tubes - 9.4" or 240mm long, A3 postal tubes - 13" or 330mm long although some people use 14" (355mm), A2 - 17.5" or 448mm long , A1 postal tubes - 25" or 635mm long or B size tubes. Individual postal tubes can also be supplied in numerous lengths. Visit the diameter page to buy single tubes.
Using the Table below to Identify the tube you need: the column in red is the usable length of our storage or postal tubes with the reduction made for the use of OUR plastic end caps (end caps from other manufacturers may differ). So use this column to identify the usable length of the postal tube required for your document, map, poster etc. The overall length of the cardboard tube with the usable length you need is shown in mm, cm, or inches in the other three columns.
When attempting to work out the best diameter to use, it is a good idea to roll the item to be inserted and put an elastic band around the item so you can measure the diameter of the poster etc.
Please note: when you buy our postal tubes, we quote the diameter (the measurement across the opening of the tube) we do not quote in radius or circumference. Please visit our main postal tube selling page to select the diameter you require here
| Below Are Mailing Tube Usable Lengths In Inches (Allowing 25mm For Caps) | (Overall Length) Metric Length Appx mm | (Overall Length) Metric Length Appx cm / Metres | (Overall Length) Appx Imperial Length |
| 5 inch Usable Length | 152mm Poster Tubes / 152mm Postal Tubes | 15cm Poster Tubes / 15cm Postal Tubes | 6" Poster Tubes / 6" Postal Tubes |
| 6 inches usable Length | 178mm Poster Tubes / 178mm Postal Tubes | 18cm Poster Tubes / 18cm Postal Tubes | 7" Poster Tubes / 7" Postal Tubes |
| 7 inches usable Length | 203mm Poster Tubes / 203mm Postal Tubes | 20cm Poster Tubes / 20cm Postal Tubes | 8" Poster Tubes / 8" Postal Tubes |
| 8 inches usable Length | 228mm Poster Tubes / 228mm Postal Tubes | 23cm Poster Tubes / 23cm Postal Tubes | 9" Poster Tubes / 9" Postal Tubes |
| 9 inches usable Length | 254mm Poster Tubes / 254mm Postal Tubes | 25cm Poster Tubes / 25cm Postal Tubes | 10" Poster Tubes / 10" Postal Tubes |
| 10 inches usable Length | 280mm Poster Tubes / 280mm Postal Tubes | 28cm Poster Tubes / 28cm Postal Tubes | 11" Poster Tubes / 11" Postal Tubes |
| 11 inches usable Length | 305mm Poster Tubes / 305mm Postal Tubes | 30cm Poster Tubes / 30cm Postal Tubes | 12" Poster Tubes / 12" Postal Tubes |
| 12 inches usable Length | 330mm Poster Tubes / 330mm Postal Tubes | 33cm Poster Tubes / 33cm Postal Tubes | 13" Poster Tubes / 13" Postal Tubes |
| 13 inches usable Length | 355mm Poster Tubes / 355mm Postal Tubes | 35cm Poster Tubes / 35cm Postal Tubes | 14" Poster Tubes / 14" Postal Tubes |
| 14 inches usable Length | 381mm Poster Tubes / 381mm Postal Tubes | 38cm Poster Tubes / 38cm Postal Tubes | 15" Poster Tubes / 15" Postal Tubes |
| 15 inches usable Length | 406mm Poster Tubes / 406mm Postal Tubes | 40cm Poster Tubes / 40cm Postal Tubes | 16" Poster Tubes / 16" Postal Tubes |
| 16 inches usable Length | 432mm Poster Tubes / 432mm Postal Tubes | 43cm Poster Tubes / 43cm Postal Tubes | 17" Poster Tubes / 17" Postal Tubes |
| 17 inches usable Length | 457mm Poster Tubes / 457mm Postal Tubes | 46cm Poster Tubes / 46cm Postal Tubes | 18" Poster Tubes / 18" Postal Tubes |
| 18 inches usable Length | 482mm Poster Tubes / 482mm Postal Tubes | 48cm Poster Tubes / 48cm Postal Tubes | 19" Poster Tubes / 19" Postal Tubes |
| 19 inches usable Length | 508mm Poster Tubes / 508mm Postal Tubes | 51cm Poster Tubes / 51cm Postal Tubes | 20" Poster Tubes / 20" Postal Tubes |
| 20 inches usable Length | 533mm Poster Tubes / 533mm Postal Tubes | 53cm Poster Tubes / 53cm Postal Tubes | 21" Poster Tubes / 21" Postal Tubes |
| 21 inches usable Length | 559mm Poster Tubes / 559mm Postal Tubes | 56cm Poster Tubes / 56cm Postal Tubes | 22" Poster Tubes / 22" Postal Tubes |
| 22 inches usable Length | 584mm Poster Tubes / 584mm Postal Tubes | Poster Tubes / Postal Tubes 58cm | 23" Poster Tubes / 23" Postal Tubes |
| 23 inches usable Length | 609mm Poster Tubes / 609mm Postal Tubes | 61cm Poster Tubes / 61cm Postal Tubes | 24" Poster Tubes / 24" Postal Tubes |
| 24 inches usable Length | 635mm Poster Tubes / 635mm Postal Tubes | 64cm Poster Tubes / 64cm Postal Tubes | 25" Poster Tubes / 25" Postal Tubes |
| 25 inches usable Length | 660mm Poster Tubes / Postal Tubes | 66cm Poster Tubes / 66cm Postal Tubes | 26" Poster Tubes / 26" Postal Tubes |
| 26 inches usable Length | 686mm Poster Tubes / 686mm Postal Tubes | Poster Tubes / Postal Tubes 69cm | 27" Poster Tubes / 27" Postal Tubes |
| 27 inches usable Length | 711mm Poster Tubes / 711mm Postal Tubes | 71cm Poster Tubes / 71cm Postal Tubes | 28" Poster Tubes / 28" Postal Tubes |
| 28 inches usable Length | 736mm Poster Tubes / 736mm Postal Tubes | 74cm Poster Tubes / 74cm Postal Tubes | 29" Poster Tubes / 29" Postal Tubes |
| 29 inches usable Length | 762mm Poster Tubes / 762mm Postal Tubes | 76cm Poster Tubes / 76cm Postal Tubes | 30" Poster Tubes / 30" Postal Tubes |
| 30 inches usable Length | 787mm Poster Tubes / 787mm Postal Tubes | 79cm Poster Tubes / 79cm Postal Tubes | 31" Poster Tubes / 31" Postal Tubes |
| 31 inches usable Length | 813mm Poster Tubes / 813mm Postal Tubes | 81cm Poster Tubes / 81cm Postal Tubes | 32" Poster Tubes / 32" Postal Tubes |
| 32 inches usable Length | 838mm Poster Tubes / 838mm Postal Tubes Appx | 84cm Poster Tubes / 84cm Postal Tubes | 33" Poster Tubes / 33" Postal Tubes |
| 33 inches usable Length | 864mm Poster Tubes / 864mm Postal Tubes | 86cm Poster Tubes / 86cm Postal Tubes | 34" Poster Tubes / 34" Postal Tubes |
| 34 inches usable Length | 889mm Poster Tubes / 889mm Postal Tubes | 89cm Poster Tubes / 89cm Postal Tubes | 35" Poster Tubes / 35" Postal Tubes |
| 35 inches usable Length | 914mm Poster Tubes / 914mm Postal Tubes | 91cm Poster Tubes / 91cm Postal Tubes | 36" Poster Tubes / 36" Postal Tubes |
| 36 inches usable Length | 940mm Poster Tubes / 940mm Postal Tubes | 94cm Poster Tubes / 94cm Postal Tubes | 37" Poster Tubes / 37" Postal Tubes |
| 37 inches usable Length | 965mm Poster Tubes / 965mm Postal Tubes | 97cm Poster Tubes / 97cm Postal Tubes | 38" Poster Tubes / 38" Postal Tubes |
| 38 inches usable Length | 991mm Poster Tubes / 991mm Postal Tubes | 99cm Poster Tubes / 99cm Postal Tubes | 39" Poster Tubes / 39" Postal Tubes |
| 39 inches usable Length | 1016mm Poster Tubes / 1016mm Postal Tubes | 101cm Poster Tubes / 101cm Postal Tubes | 40" Poster Tubes / 40" Postal Tubes |
| 40 inches usable Length | 1041mm Poster Tubes / 1041mm Postal Tubes | 104cm Poster Tubes / 104cm Postal Tubes | 41" Poster Tubes / 41" Postal Tubes |
| 41 inches usable Length | 1067mm Poster Tubes / 1067mm Postal Tubes | 107cm Poster Tubes / 107cm Postal Tubes | 42" Poster Tubes / 42" Postal Tubes |
| 42 inches usable Length | 1092mm Poster Tubes / 1092mm Postal Tubes | 109cm Poster Tubes / 109cm Postal Tubes | 43" Poster Tubes / 43" Postal Tubes |
| 43 inches usable Length | 1118mm Poster Tubes / 1118mm Postal Tubes | 112cm Poster Tubes / 112cm Postal Tubes | 44" Poster Tubes / 44" Postal Tubes Appx |
| 44 inches usable Length | 1143mm Poster Tubes / 1143mm Postal Tubes | 114cm Poster Tubes / 114cm Postal Tubes | 45" Poster Tubes / 45" Postal Tubes |
| 45 inches usable Length | 1168mm Poster Tubes / 1168mm Postal Tubes | 1168cm Poster Tubes / 1168cm Postal Tubes | 46" Poster Tubes / 46" Postal Tubes |
| 46 inches usable Length | 1194mm Poster Tubes / 1194mm Postal Tubes | 119cm Poster Tubes / 119cm Postal Tubes | 47" Poster Tubes / 47" Postal Tubes |
| 47 inches usable Length | 1219mm Poster Tubes / 1219mm Postal Tubes | 122cm Poster Tubes / 122cm Postal Tubes | 48" Poster Tubes / 48" Postal Tubes |
| 48 inches usable Length | 1245mm Poster Tubes / 1245mm Postal Tubes | 126cm Poster Tubes / 126cm Postal Tubes | 49" Poster Tubes / 49" Postal Tubes |
| 49 inches usable Length | 1270mm Poster Tubes / 1270mm Postal Tubes | 127cm Poster Tubes / 127cm Postal Tubes | 50" Poster Tubes / 50" Postal Tubes |
| 50 inches usable Length | 1295mm Poster Tubes / 1295mm Postal Tubes | 130cm Poster Tubes / 130cm Postal Tubes | 51" Poster Tubes / 51" Postal Tubes |
| 51 inches usable Length | 1321mm Poster Tubes / 1321mm Postal Tubes | 132cm Poster Tubes / 132cm Postal Tubes | 52" Poster Tubes / 52" Postal Tubes |
| 52 inches usable Length | 1346mm Poster Tubes / 1346mm Postal Tubes | 134cm Poster Tubes / 134cm Postal Tubes | 53" Poster Tubes / 53" Postal Tubes |
| 53 inches usable Length | 1372mm Poster Tubes / 1372mm Postal Tubes | 137cm Poster Tubes / 137cm Postal Tubes | 54" Poster Tubes / 54" Postal Tubes |
| 54 inches usable Length | 1397mm Poster Tubes / 1397mm Postal Tubes | 139cm Poster Tubes / 139cm Postal Tubes | 55" Poster Tubes / 55" Postal Tubes |
| 55 inches usable Length | 1422mm Poster Tubes / 1422mm Postal Tubes | 142cm Poster Tubes / 142cm Postal Tubes | 56" Poster Tubes / 56" Postal Tubes |
| 56 inches usable Length | 1448mm Poster Tubes / 1448mm Postal Tubes | 144cm Poster Tubes / 144cm Postal Tubes | 57" Poster Tubes / 57" Postal Tubes |
| 57 inches usable Length | 1473mm Poster Tubes / 1473mm Postal Tubes | 147cm Poster Tubes / 147cm Postal Tubes | 58" Poster Tubes / 58" Postal Tubes |
| 58 inches usable Length | 1499mm Poster Tubes / 1499mm Postal Tubes | 150cm Poster Tubes / 150cm Postal Tubes | 59" Poster Tubes / 59" Postal Tubes |
| 59 inches usable Length | 1524mm Poster Tubes / 1524mm Postal Tubes | 152cm Poster Tubes / 152cm Postal Tubes | 60" Poster Tubes / 60" Postal Tubes |
| 60 inches usable Length | 1549mm Poster Tubes / 1549mm Postal Tubes | 155cm Poster Tubes / 155cm Postal Tubes | 61" Poster Tubes / 61" Postal Tubes |
| 61 inches usable Length | 1575mm Poster Tubes / 1575mm Postal Tubes | 158cm Poster Tubes / 158cm Postal Tubes | 62" Poster Tubes / 62" Postal Tubes |
| 62 inches usable Length | 1600mm Poster Tubes / 1600mm Postal Tubes | 160cm Poster Tubes / 160cm Postal Tubes | 63" Poster Tubes / 63" Postal Tubes |
| 63 inches usable Length | 1626mm Poster Tubes / 1626mm Postal Tubes | 163cm Poster Tubes / 163cm Postal Tubes | 64" Poster Tubes / 64" Postal Tubes |
| 64 inches usable Length | 1651mm Poster Tubes / 1651mm Postal Tubes | 165cm Poster Tubes / 165cm Postal Tubes | 65" Poster Tubes / 65" Postal Tubes |
| 65 inches usable Length | 1676mm Poster Tubes / 1676mm Postal Tubes | 168cm Poster Tubes / 168cm Postal Tubes | 66" Poster Tubes / 66" Postal Tubes |
| 66 inches usable Length | 1702mm Poster Tubes / 1702mm Postal Tubes | 170cm Poster Tubes / 170cm Postal Tubes | 67" Poster Tubes / 67" Postal Tubes |
| 67 inches usable Length | 1727mm Poster Tubes / 1727mm Postal Tubes | 173cm Poster Tubes / 173cm Postal Tubes | 68" Poster Tubes / 68" Postal Tubes |
| 68 inches usable Length | 1753mm Poster Tubes / 1753mm Postal Tubes Appx | 175cm Poster Tubes / 175cm Postal Tubes | 69" Poster Tubes / 69" Postal Tubes |
| 69 inches usable Length | 1778mm Poster Tubes / 1778mm Postal Tubes | 178cm Poster Tubes / 178cm Postal Tubes | 70" Poster Tubes / 70" Postal Tubes |
| 70 inches usable Length | 1803mm Poster Tubes / 1803mm Postal Tubes | 180cm Poster Tubes / 180cm Postal Tubes | 71" Poster Tubes / 71" Postal Tubes |
| 71 inches usable Length | 1829mm Poster Tubes / 1829mm Postal Tubes | 183cm Poster Tubes / 183cm Postal Tubes | 72" Poster Tubes / 72" Postal Tubes Appx |
| 72 inches usable Length | 1854mm Poster Tubes / 1854mm Postal Tubes Appx | 185cm Poster Tubes / 185cm Postal Tubes | 73" Poster Tubes / 73" Postal Tubes |
| 73 inches usable Length | 1880mm Poster Tubes / 1880mm Postal Tubes | 188cm Poster Tubes / 188cm Postal Tubes | 74" Poster Tubes / 74" Postal Tubes |
| 74 inches usable Length | 1905mm Poster Tubes / 1905mm Postal Tubes | 190cm Poster Tubes / 190cm Postal Tubes | 75" Poster Tubes / 75" Postal Tubes |
| 75 inches usable Length | 1930mm Poster Tubes / 1930mm Postal Tubes | Poster Tubes / Postal Tubes 193cm | 76" Poster Tubes / 76" Postal Tubes |
| 76 inches usable Length | 1955mm Poster Tubes / 1955mm Postal Tubes | 195cm Poster Tubes / 195cm Postal Tubes | 77" Poster Tubes / 77"Postal Tubes |
| 77 inches usable Length | 1981mm Poster Tubes / 1981mm Postal Tubes | 198cm Poster Tubes / 198cm Postal Tubes | 78" Poster Tubes / 78" Postal Tubes |
| 78 inches usable Length | 2007mm Poster Tubes / 2007mm Postal Tubes | 200cm Poster Tubes / 200cm Postal Tubes | 79" Poster Tubes / 79" Postal Tubes |
| 79 inches usable Length | 2032mm Poster Tubes / 2032mm Postal Tubes | 203cm Poster Tubes / 203cm Postal Tubes | 80" Poster Tubes / 80" Postal Tubes |
| 80 inches usable Length | 2057mm Poster Tubes / 2057mm Postal Tubes | 205cm Poster Tubes / 205cm Postal Tubes | 81" Poster Tubes / 81" Postal Tubes |
| 81 inches usable Length | 2083mm Poster Tubes / 2083mm Postal Tubes | 208cm Poster Tubes / 208cm Postal Tubes | 82" Poster Tubes / 82" Postal Tubes |
| 82 inches usable Length | 2108mm Poster Tubes / 2108mm Postal Tubes | 210cm Poster Tubes / 210cm Postal Tubes | 83" Poster Tubes / 83" Postal Tubes |
| 83 inches usable Length | 2134mm Poster Tubes / 2134mm Postal Tubes | 213cm Poster Tubes / 213cm Postal Tubes | 84" Poster Tubes / 84" Postal Tubes |
| 84 inches usable Length | 2159mm Poster Tubes / 2159mm Postal Tubes | 215cm Poster Tubes / 215cm Postal Tubes | 85" Poster Tubes / 85" Postal Tubes |
| 85 inches usable Length | 2184mm Poster Tubes / 2184mm Postal Tubes | 218cm Poster Tubes / 218cm Postal Tubes | 86" Poster Tubes / 86" Postal Tubes |
| 86 inches usable Length | 2210mm Poster Tubes / 2210mm Postal Tubes | 221cm Poster Tubes / 221cm Postal Tubes | 87" Poster Tubes / 87" Postal Tubes |
| 87 inches usable Length | 2235mm Poster Tubes / 2235mm Postal Tubes | 224cm Poster Tubes / 224cm Postal Tubes | 88" Poster Tubes / 88" Postal Tubes |
| 88 inches usable Length | 2261mm Poster Tubes / 2261mm Postal Tubes | 226cm Poster Tubes / 226cm Postal Tubes | 89" Poster Tubes / 89" Postal Tubes |
| 89 inches usable Length | 2286mm Poster Tubes / 2286mm Postal Tubes | 228cm Poster Tubes / 228cm Postal Tubes | 90" Poster Tubes / 90" Postal Tubes |