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    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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