Royal Mail

 sizing guide

Length mm

Width mm

Thickness mm

Letter

< 240

< 165

<   5

Large letter

< 353

< 250

< 25

Packet

> 353

> 250

> 25

Royal Mail

weight breaks

Weight g

Letter

0-100

Large letter

0-100

100-250

251-500

501-750

Packet

0-100

100-250

251-500

501-750

751-1000

1001-1250

Increments of 250g

 Standard International paper sizes

Sheet size mm

A4

¼A4

74x210

⅓A4

99x210

⅔A4

198x210

¾A4

223x210

A4x11

297x279

A4x14

297x356

SRA1

SRA1

640x900

RA1

610x860

SRA2

450x640

RA2

430x610

B3

353x500

B4

250x353 *

B5

176x250

AO

A0

841x1189

A1

594x841

A2

420x594

A3

297x420

A4

210x297

A5

148x210

A6

105x148

A7

74x105

Foolscap

Foolscap

203x330

Quarto

203x254

6mo

165x203

8vo

127x203

Metric Foolscap

210x330

American Quarto

216x279

American Foolscap

216x330

 Useful Paper Terms

Description

Bank

Lightweight 'flimsy' for copies 30-60gsm

Board

Usually 175gsm and above

Bond

Writing or word processing 60-120gsm (normally 70-85gsm)

Cartridge

90-160gsm

Fly

Folded

Graph

Square and sub divided

GSM (gm²)

Grammes per square metre of a single sheet

Kraft

Tough wrapping paper normally brown and ribbed

Laid

With watermarked lines, close horizontally, wide vertically

Parchment

Superior hard-sized

Quadrille

Square with no sub divisions

Quire

25 sheets

Ream

500 sheets

Vellum

Cream coloured

Wove

No discernible wire marks

 Standard paper envelope sizes

Pocket mm

Wallet mm

DL

220x110

110x220

C6

162x114

114x162

C5

229x162

162x229

B5

254x178

178x254

C4

324x229

229x324

B4

353x250

C3

457x324