Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

bulk equivalents

    Caliper/  Pages
    4 sheets  per Inch
      5.5     1,454
      6.0     1,332
      6.5     1,230
      7.0     1,142
      7.5     1,066
      8.0     1,000
      8.5       942
      9.0       888
      9.5       842
     10.0       800
     10.5       762
     11.0       726
     11.5       696
     12.0       666
     12.5       640
     13.0       614
     13.5       592
     14.0       570
     14.5       552
     15.0       532
     15.5       516
     16.0       500
     16.5       484
     17.0       470
     17.5       456
     18.0       444
     18.5       432
     19.0       420
     19.5       410
     20.0       400
     20.5       390
     21.0       380
     21.5       372
     22.0       364
     22.5       356
     23.0       348
     23.5       340
     24.0       332
     24.5       326
     25.0       320
     25.5       314
     26.0       308
     26.5       302
     27.0       296
     27.5       290
     28.0       286
     28.5       280
     29.0       276
     29.5       272
     30.0       266
     30.5       262
     31.0       258
     31.5       254
     32.0       250
     32.5       246
     33.0       242
     33.5       238
     34.0       234
     34.5       232
     35.0       228
     35.5       224
     36.0       222
     36.5       218
     37.0       216
     37.5       212
     38.0       210
     38.5       208
     39.0       204
     39.5       202
     40.0       200
     40.5       198
     41.0       194
     41.5       192
     42.0       190
     42.5       188
     43.0       186
     43.5       184
     44.0       182
     44.5       180
     45.0       178
     45.5       176
     46.0       174
     46.5       172
     47.0       170
     47.5       168
     48.0       166
     48.5       164
     49.0       162
     49.5       162
     50.0       160
 (52)