Index: usr.sbin/makefs/makefs.8
===================================================================
--- usr.sbin/makefs/makefs.8
+++ usr.sbin/makefs/makefs.8
@@ -225,6 +225,17 @@
 .It Fl s Ar image-size
 Set the size of the file system image to
 .Ar image-size .
+This is equivalent to setting both the minimum
+.Fl ( m )
+and the maximum
+.Fl ( M )
+sizes to the same value.
+For
+.Sy ffs
+the
+.Ar image-size
+does not include the
+.Ar offset .
 .It Fl T Ar timestamp
 Specify a timestamp to be set for all filesystem files and directories
 created so that repeatable builds are possible.