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)