Basis Weight Comparison - Equivalent Ream Weights
| BOND (17" x 22") |
BOOK (25" x 38") |
COVER (20" x 26") |
INDEX (25.5" x 30.5") |
BRISTOL (22.5" x 28.5") |
TAG (24" x 36") |
GRAMS PER SQ. METER |
|---|---|---|---|---|---|---|
| 10 LBS | 25 LBS | 14 LBS | 21 LBS | 17 LBS | 23 LBS | 38 |
| 11 LBS | 28 LBS | 15 LBS | 23 LBS | 19 LBS | 25 LBS | 41 |
| 12 LBS | 30 LBS | 17 LBS | 25 LBS | 21 LBS | 28 LBS | 45 |
| 13 LBS | 33 LBS | 18 LBS | 27 LBS | 22 LBS | 30 LBS | 49 |
| 14 LBS | 36 LBS | 19 LBS | 29 LBS | 24 LBS | 32 LBS | 53 |
| 15 LBS | 38 LBS | 21 LBS | 31 LBS | 26 LBS | 35 LBS | 56 |
| 16 LBS | 41 LBS | 22 LBS | 33 LBS | 27 LBS | 37 LBS | 60 |
| 17 LBS | 43 LBS | 24 LBS | 35 LBS | 29 LBS | 39 LBS | 64 |
| 18 LBS | 46 LBS | 25 LBS | 37 LBS | 31 LBS | 42 LBS | 68 |
| 19 LBS | 48 LBS | 26 LBS | 40 LBS | 33 LBS | 44 LBS | 71 |
| 20 LBS | 51 LBS | 28 LBS | 42 LBS | 34 LBS | 46 LBS | 75 |
| 21 LBS | 53 LBS | 29 LBS | 44 LBS | 36 LBS | 49 LBS | 79 |
| 22 LBS | 56 LBS | 31 LBS | 46 LBS | 38 LBS | 51 LBS | 83 |
| 23 LBS | 58 LBS | 32 LBS | 48 LBS | 39 LBS | 53 LBS | 86 |
| 24 LBS | 61 LBS | 33 LBS | 50 LBS | 41 LBS | 55 LBS | 90 |
| 25 LBS | 64 LBS | 35 LBS | 52 LBS | 43 LBS | 58 LBS | 94 |
| 26 LBS | 66 LBS | 36 LBS | 54 LBS | 45 LBS | 60 LBS | 98 |
| 27 LBS | 69 LBS | 38 LBS | 56 LBS | 46 LBS | 62 LBS | 102 |
| 28 LBS | 71 LBS | 39 LBS | 58 LBS | 48 LBS | 65 LBS | 105 |
| 29 LBS | 74 LBS | 40 LBS | 60 LBS | 50 LBS | 67 LBS | 109 |
| 30 LBS | 76 LBS | 42 LBS | 62 LBS | 51 LBS | 69 LBS | 113 |
| 31 LBS | 79 LBS | 43 LBS | 64 LBS | 53 LBS | 72 LBS | 117 |
| 32 LBS | 81 LBS | 44 LBS | 67 LBS | 55 LBS | 74 LBS | 120 |
| 33 LBS | 84 LBS | 46 LBS | 69 LBS | 57 LBS | 76 LBS | 124 |
| 34 LBS | 86 LBS | 47 LBS | 71 LBS | 58 LBS | 79 LBS | 128 |
| 35 LBS | 89 LBS | 49 LBS | 73 LBS | 60 LBS | 81 LBS | 132 |
| 36 LBS | 91 LBS | 50 LBS | 75 LBS | 62 LBS | 83 LBS | 135 |
| 37 LBS | 97 LBS | 53 LBS | 79 LBS | 65 LBS | 88 LBS | 143 |
| 39 LBS | 99 LBS | 54 LBS | 81 LBS | 67 LBS | 90 LBS | 147 |
| 40 LBS | 102 LBS | 56 LBS | 83 LBS | 69 LBS | 92 LBS | 150 |
| 43 LBS | 110 LBS | 60 LBS | 90 LBS | 74 LBS | 100 LBS | 162 |
| 47 LBS | 120 LBS | 65 LBS | 97 LBS | 81 LBS | 108 LBS | 177 |
| 50 LBS | 127 LBS | 70 LBS | 104 LBS | 86 LBS | 116 LBS | 188 |
| 52 LBS | 132 LBS | 72 LBS | 108 LBS | 89 LBS | 120 LBS | 196 |
| 53 LBS | 134 LBS | 74 LBS | 110 LBS | 91 LBS | 122 LBS | 199 |
| 54 LBS | 138 LBS | 75 LBS | 113 LBS | 93 LBS | 125 LBS | 203 |
| 58 LBS | 146 LBS | 80 LBS | 120 LBS | 99 LBS | 133 LBS | 218 |