Sometimes the thickness of Cover/Card stock is used instead of its weight. In North America, paper thickness can be displayed in points (1/1000″ or .001″). For example, a 10 pt. Card stock is 0.010″ thick (about the weight of a 140lb Index stock) while 12 pt. Card stock is 0.012″ thick (about the weight of a 100lb Cover stock).
Paper Weight Comparison Chart (Lightest to Heaviest)
| #’s | gsm | Paper Stock |
|---|---|---|
| 16lb | 60.2 g/m² | Bond/Writing/Ledger |
| 40lb | 60.2 g/m² | Book/Text/Offset |
| 20lb | 75.2 g/m² | Bond/Writing/Ledger |
| 50lb | 75.2 g/m² | Book/Text/Offset |
| 24lb | 90.3 g/m² | Bond/Writing/Ledger |
| 60lb | 90.3 g/m² | Book/Text/Offset |
| 80lb | 104 g/m² | Book/Text/Offset |
| 28lb | 105.4 g/m² | Bond/Writing/Ledger |
| 70lb | 105.4 g/m² | Book/Text/Offset |
| 40lb | 109.1 g/m² | Cover |
| 50lb | 135.5 g/m² | Cover |
| 60lb | 161.8 g/m² | Cover |
| 100lb | 161.8 g/m² | Tag |
| 90lb | 161.8 g/m² | Index |
| 65lb | 176.8 g/m² | Cover |
| 110lb | 199.4 g/m² | Index |
| 80lb | 218.2 g/m² | Cover |
| 90lb | 244.6 g/m² | Cover |
| 140lb | 252.1 g/m² | Index |
| 100lb | 270.0g/m² | Cover |
| 170lb | 308.5 g/m² | Index |
| 220lb | 385.1 g/m² | Index |