It depends on what wire size you are using and the weight of the paper in the cover and pages. The table below has some basic guidelines. If you are using heavier stock for covers, remember to subtract some pages to accommodate the cover.
| Wire Size | Paper Type/Weight | Cover Material | Approximate Max Page Count |
| 3/8" | index cards | mat board | 10 |
| 3/8" | 20lb (standard copy paper) | | 20 |
| 1/2" | 60 weight paper | plastic gift/credit cards | 40 |
| 1/2" | index cards | mat board | 40 |
| 1/2" | index cards | fancy paper w/cereal box backing | 50 |
| 1/2" | 20lb (standard copy paper) | | 100 |
| 3/4" | index cards | | 50-70 |
| 3/4" | 20lb (standard copy paper) | | 100-140 |
| 1 1/4" | index cards | | 110 |
| 1 1/4" | 20lb (standard copy paper) | | 220 |
