Index: head/bin/pax/pax.1
===================================================================
--- head/bin/pax/pax.1
+++ head/bin/pax/pax.1
@@ -33,7 +33,7 @@
 .\"	@(#)pax.1	8.4 (Berkeley) 4/18/94
 .\" $FreeBSD$
 .\"
-.Dd March 17, 2015
+.Dd December 29, 2018
 .Dt PAX 1
 .Os
 .Sh NAME
@@ -793,6 +793,16 @@
 .Li x
 to indicate a product.
 .Pp
+Note that the specified size is for the uncompressed pax image itself.
+If the
+.Fl z
+option is also used, the resulting file may contain fewer
+.Ar bytes ,
+according to the compressibility of the archive contents.
+See
+.Xr zip 1
+if compressed volumes of predictable size are required.
+.Pp
 .Em Warning :
 Only use this option when writing an archive to a device which supports
 an end of file read condition based on last (or largest) write offset
@@ -804,7 +814,7 @@
 option, except that the file inode change time is checked instead of the
 file modification time.
 The file inode change time can be used to select files whose inode information
-(e.g.\& uid, gid, etc.) is newer than a copy of the file in the destination
+(e.g., uid, gid, etc.) is newer than a copy of the file in the destination
 .Ar directory .
 .It Fl E Ar limit
 Limit the number of consecutive read faults while trying to read a flawed
@@ -903,7 +913,7 @@
 The
 .Ar c
 specifies the comparison of inode change time (the time when the file
-inode was last changed; e.g.\& a change of owner, group, mode, etc).
+inode was last changed; e.g., a change of owner, group, mode, etc).
 When
 .Ar c
 and