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DateTime: 2013-08-01
For easy reference, the following is a summary of the principal standard paper sizes and weights and their conversion equivalents using both the imperial and metric systems.

Linear Measurement

USA/British Metric
1 inch 2.54cm
1 foot 0.3048m
1 yard 0.9144m

Standard Paper Size

USA size
Letter size 8.5" x 11"
Legal size 8.5" x 14"
Tabloid size 11" x 17"

Metric Size

A5 size 148mm x 210mm (5.83" x 8.27")
A4 size 210mm x 297mm (8.27" x 11.69")
A3 size 297mm x 420mm (11.69" x 16.54")
A2 size 420mm x 594mm (16.54" x 23.39")

Popular Paper Weight Conversion

International USA
Gloss Art Paper Coated Stock (both sides gloss)
gsm unit lbs book unit caliper point
79 53 2.4
85 57 2.8
95 64 3.2
105 71 3.5
113 76 3.9
128 86 4.3
140 95 4.5
157 106 5.1
Matte Art Paper Coated Stock (both sides matte)
gsm unit lbs book unit caliper point
79 53 3.0
85 57 3.3
95 64 3.9
105 71 4.3
113 76 4.5
128 86 6.5
140 95 8.3
Woodfree Art Paper Uncoated Book Paper
gsm unit lbs book unit caliper point
60 41 2.6
70 47 3.4
80 54 3.5
100 68 4.3
120 81 5.1
140 95 5.9
180 122 8.1
Art Board Gloss Coated Board Cover
gsm unit lbs book unit caliper point
190 70 8
210 78 10
230 85 11
260 96 12
310 115 15
1-side Art Board Cast Coated 1-side board cover
gsm unit lbs book unit caliper point
220 82 9
250 93 10
270 100 12
300 111 13
330 122 15
Binding Board Binding Board
gsm unit Ounces thickness
1000 20 1.5mm/ .06"
1200 24 2.0mm/ .08"
1450 32 2.5mm/ .10"
1750 40 3.0mm/ .12"
2150 48 3.5mm/ .14"
Metric System USA Paper Size
gsm unit type of stock in inches weight in lbs
44 book: 25" x 38" 30
59 40
67 45
74 50
89 60
104 70
118 80
133 90
148 100
178 120
135 cover: 20" x 26" 50
162 60
176 65
216 80
243 90
270 100
297 110
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