--- lib/paperspecs.orig	2018-09-12 15:10:06.169197000 +0900
+++ lib/paperspecs	2018-09-12 15:14:37.850327000 +0900
@@ -53,3 +53,27 @@
 csheet 1224 1584
 dsheet 1584 2448
 esheet 2448 3168
+isob0 1000 1414 mm
+isob1 707 1000 mm
+isob2 500 707 mm
+isob3 353 500 mm
+isob4 250 353 mm
+isob5 176 250 mm
+isob6 125 176 mm
+isob7 88 125 mm
+isob8 62 88 mm
+isob9 44 62 mm
+isob10 31 44 mm
+jisb0 1030 1456 mm
+jisb1 728 1030 mm
+jisb2 515 728 mm
+jisb3 364 515 mm
+jisb4 257 364 mm
+jisb5 182 257 mm
+jisb6 128 182 mm
+jisb7 91 128 mm
+jisb8 64 91 mm
+jisb9 45 64 mm
+jisb10 32 45 mm
+jisb11 22 32 mm
+jisb12 16 22 mm