THUNDERBOLT DESIGNS

Basis Weight Comparison Chart

Use this chart to find comparable weights between different types of paper. The "Basis Weight" of any paper is generally a reference to the weight of the paper when measured in lots of 500 sheets of parent size stock. The "parent size" paper is the full measurement of a sheet of paper before it is cut down to more useable sizes, like letter-size or ledger-size.

Example: To determine what weight text sheet is similar to a 28 lb. bond, first locate 28 lb. bond in the top section on the fifth line of the chart. Move across the line to the "book" column. You will see that 28 lb. bond would be similar in weight to standard 70 lb. book.

Basis Weight Comparisons

Bond
17 x 22
Book
25 x 38
Cover
20 x 26
Bristol
22-1/2 x 28-1/2
Index
25-1/2 x 30-1/2
Tag
24 x 36
Bond
Duplicator
Ledger
Mimeo
Writing
13
33
18
22
27
30
16
41
22
27
33
37
20
51
28
34
42
46
24
61
33
41
50
56
28
71
39
48
58
64
32
81
45
55
67
74
36
91
50
62
75
83
40
102
56
69
83
93
44
112
61
75
92
102
Book
Offset
Text
12
30
16
20
25
27
16
40
21
27
32
36
18
45
24
30
37
41
20
50
27
34
41
45
24
60
32
40
49
55
28
70
38
47
57
64
31
80
43
54
66
73
35
90
48
60
74
82
39
100
54
67
81
91
47
120
65
80
98
109
59
150
80
100
123
136
Cover
29
73
40
49
60
66
36
91
50
62
75
82
43
110
60
74
90
100
47
119
65
80
96
108
58
146
80
99
120
134
65
164
90
111
135
149
72
183
100
124
150
166
Vellum
Bristol
33
84
46
57
69
77
39
99
54
67
81
90
46
118
65
80
98
109
58
148
81
100
121
135
70
178
97
120
146
162
Index
43
110
60
74
90
100
53
135
74
91
110
122
67
170
93
115
140
156
82
208
114
140
170
189
105
267
146
182
220
244
Tag
43
110
60
74
90
100
54
137
75
93
113
125
65
165
90
111
135
150
76
192
105
130
158
175
87
220
120
148
180
200
109
275
151
186
225
250
130
330
181
222
270
300