--- ctxbase/page-lay.mkiv	2015-04-10 17:04:24.000000000 +0200
+++ page-lay.mkiv	2015-04-22 18:00:56.694275114 +0200
@@ -1452,6 +1452,8 @@
 %D decided to stick to non metric values. Thanks to Nelson
 %D Beebe for completing the inch based list.
 
+\definepapersize [halfinvoice] [\c!width=4.25in,\c!height=5.5in]
+\definepapersize [invoice]   [\c!width=5.5in,\c!height=8.5in]
 \definepapersize [letter]    [\c!width=8.5in,\c!height=11in]
 \definepapersize [ledger]    [\c!width=11in,\c!height=17in]
 \definepapersize [tabloid]   [\c!width=17in,\c!height=11in]