Paper Conversion Guide
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Book and Offset | Bond | Cover | Vellum Bristol | Index | Tag

Book and Offset - Top
Book/Offset (25 x 38)	Bond (17 x 22)	Cover (20 x 26)	Vellum Bristol (22½ x 28½)	Index (25½ x 30½)	Tag (24 x 36)	Metric GSM
30	12	16	20	25	27	44
40	16	22	27	33	36	59
45	18	25	30	37	41	67
50	20	27	34	41	45	74
60	24	33	40	49	55	89
70	28	38	47	57	64	104
80	31	44	54	65	73	118
90	35	49	60	74	82	133
100	39	55	67	82	91	148
120	47	66	80	98	109	178
Bond - Top
Book/Offset (25 x 38)	Bond (17 x 22)	Cover (20 x 26)	Vellum Bristol (22½ x 28½)	Index (25½ x 30½)	Tag (24 x 36)	Metric GSM
33	13	18	22	27	30	49
41	16	22	27	33	37	61
51	20	28	34	42	46	75
55	24	33	41	50	56	90
71	28	39	48	58	64	105
81	32	45	55	67	74	120
91	36	50	62	75	83	135
102	40	56	69	83	93	151
Cover - Top
Book/Offset (25 x 38)	Bond (17 x 22)	Cover (20 x 26)	Vellum Bristol (22½ x 28½)	Index (25½ x 30½)	Tag (24 x 36)	Metric GSM
91	36	50	62	75	82	135
110	43	60	74	90	100	163
119	47	65	80	97	108	176
146	58	80	99	120	134	216
164	65	90	111	135	149	243
183	72	100	124	150	166	271
Vellum Bristol - Top
Book/Offset (25 x 38)	Bond (17 x 22)	Cover (20 x 26)	Vellum Bristol (22½ x 28½)	Index (25½ x 30½)	Tag (24 x 36)	Metric GSM
100	39	55	67	81	91	148
120	47	65	80	98	109	178
148	58	80	100	121	135	219
176	70	97	120	146	162	261
207	82	114	140	170	189	306
237	93	130	160	194	216	351
Index - Top
Book/Offset (25 x 38)	Bond (17 x 22)	Cover (20 x 26)	Vellum Bristol (22½ x 28½)	Index (25½ x 30½)	Tag (24 x 36)	Metric GSM
110	43	60	74	90	100	163
135	53	74	91	110	122	199
170	67	93	115	140	156	252
208	82	114	140	170	189	328
Tag - Top
Book/Offset (25 x 38)	Bond (17 x 22)	Cover (20 x 26)	Vellum Bristol (22½ x 28½)	Index (25½ x 30½)	Tag (24 x 36)	Metric GSM
110	43	60	74	90	100	163
137	54	75	93	112	125	203
165	65	90	111	135	150	244
192	76	105	130	158	175	284
220	87	120	148	180	200	326
275	109	151	186	225	250	407