diff --git a/libisoburn/trunk/xorriso/disk_ops.c b/libisoburn/trunk/xorriso/disk_ops.c
index fc4f1f00..ea8ccebe 100644
--- a/libisoburn/trunk/xorriso/disk_ops.c
+++ b/libisoburn/trunk/xorriso/disk_ops.c
@@ -1087,6 +1087,7 @@ int Xorriso_findx_action(struct XorrisO *xorriso, struct FindjoB *job,
  time_t date= 0;
  mode_t mode_or= 0, mode_and= ~1;
  char *target, *text_2, sfe[5*SfileadrL], *disk_prefix, iso_path[SfileadrL];
+ char *basename;
  struct FindjoB *subjob;
  struct stat stbuf; 
 
@@ -1167,6 +1168,16 @@ int Xorriso_findx_action(struct XorrisO *xorriso, struct FindjoB *job,
      Xorriso_result(xorriso,0);
    }
    {ret= 1; goto ex;}
+ } else if(action == 40) { /* estimate_size */
+   basename= strrchr(abs_path, '/');
+   if(basename != NULL)
+     basename++;
+   else
+     basename= abs_path;
+   ret= lstat(abs_path, &stbuf);
+   if(ret != -1)
+     ret= Xorriso_estimate_file_size(xorriso, job, basename, stbuf.st_mode,
+                                     stbuf.st_size, 0);
  } else {
    sprintf(xorriso->result_line, "%s\n", Text_shellsafe(show_path, sfe, 0));
    Xorriso_result(xorriso, 0);
diff --git a/libisoburn/trunk/xorriso/findjob.c b/libisoburn/trunk/xorriso/findjob.c
index 4770538e..a6a0740e 100644
--- a/libisoburn/trunk/xorriso/findjob.c
+++ b/libisoburn/trunk/xorriso/findjob.c
@@ -377,6 +377,8 @@ int Findjob_new(struct FindjoB **o, char *start_path, int flag)
  if(m->start_path==NULL)
    goto failed;
  m->found_path= NULL;
+ m->estim_upper_size= 0;
+ m->estim_lower_size= 0;
  m->subjob= NULL;
  m->errmsg[0]= 0;
  m->errn= 0;
diff --git a/libisoburn/trunk/xorriso/findjob.h b/libisoburn/trunk/xorriso/findjob.h
index 45f54ce5..e5d0e272 100644
--- a/libisoburn/trunk/xorriso/findjob.h
+++ b/libisoburn/trunk/xorriso/findjob.h
@@ -154,6 +154,7 @@ struct FindjoB {
    37= mkisofs_r
    38= sort_weight number
    39= hide on|iso_rr|joliet|off
+   40= estimate_size
  */
  int action;
  int prune;
@@ -167,6 +168,8 @@ struct FindjoB {
  int type; /* see Xorriso_set_time flag, also used as weight */
  time_t date;
  char *found_path;
+ off_t estim_upper_size;
+ off_t estim_lower_size;
  struct FindjoB *subjob;
 
  /* Errors */
diff --git a/libisoburn/trunk/xorriso/iso_manip.c b/libisoburn/trunk/xorriso/iso_manip.c
index cd141824..80b043c0 100644
--- a/libisoburn/trunk/xorriso/iso_manip.c
+++ b/libisoburn/trunk/xorriso/iso_manip.c
@@ -1688,6 +1688,29 @@ int Xorriso_set_hidden(struct XorrisO *xorriso, void *in_node, char *path,
 }
 
 
+/* @param flag bit0= increase only upper estimation
+*/
+int Xorriso_estimate_file_size(struct XorrisO *xorriso, struct FindjoB *job,
+                       char *basename, mode_t st_mode, off_t st_size, int flag)
+{
+ off_t upper, lower, size;
+
+  lower = 3 * strlen(basename) + 34; /* >>> + minimum RR ? */
+  upper = 3 * strlen(basename) + 2048;
+  if(S_ISREG(st_mode)) {
+    size= ((st_size + (off_t) 2047) / (off_t) 2048) * (off_t) 2048;
+    lower+= size;
+    upper+= size;
+  } else if(S_ISDIR(st_mode)) {
+    upper+= 4096;
+  }
+  job->estim_upper_size+= upper;
+  if(!(flag & 1))
+    job->estim_lower_size+= lower;
+  return(1);
+}
+
+
 int Xorriso_cannot_create_iter(struct XorrisO *xorriso, int iso_error,int flag)
 {
  Xorriso_process_msg_queues(xorriso,0);
@@ -1823,9 +1846,9 @@ int Xorriso_findi_action(struct XorrisO *xorriso, struct FindjoB *job,
  gid_t group= 0;
  time_t date= 0;
  mode_t mode_or= 0, mode_and= ~1;
- char *target, *text_2, sfe[5*SfileadrL], *iso_prefix, md5[16];
+ char *target, *text_2, sfe[5*SfileadrL], *iso_prefix, md5[16], *basename;
  struct FindjoB *subjob;
- struct stat dir_stbuf;
+ struct stat dir_stbuf, stbuf;
 
  action= Findjob_get_action_parms(job, &target, &text_2, &user, &group,
                                 &mode_and, &mode_or, &type, &date, &subjob, 0);
@@ -1937,6 +1960,16 @@ int Xorriso_findi_action(struct XorrisO *xorriso, struct FindjoB *job,
    iso_node_set_sort_weight(node, type);
  } else if(action == 39) { /* hide */
    Xorriso_set_hidden(xorriso, node, NULL, type, 0);
+ } else if(action == 40) { /* estimate_size */
+   basename= strrchr(abs_path, '/');
+   if(basename != NULL)
+     basename++;
+   else
+     basename= abs_path;
+   ret= Xorriso_fake_stbuf(xorriso, "", &stbuf, &node, 1);
+   if(ret > 0)
+     ret= Xorriso_estimate_file_size(xorriso, job, basename, stbuf.st_mode,
+                                     stbuf.st_size, 0);
  } else { /* includes : 15 in_iso */
    sprintf(xorriso->result_line, "%s\n", Text_shellsafe(show_path, sfe, 0));
    Xorriso_result(xorriso, 0);
diff --git a/libisoburn/trunk/xorriso/opts_d_h.c b/libisoburn/trunk/xorriso/opts_d_h.c
index c09839ad..70ad1faf 100644
--- a/libisoburn/trunk/xorriso/opts_d_h.c
+++ b/libisoburn/trunk/xorriso/opts_d_h.c
@@ -1007,6 +1007,8 @@ not_enough_exec_arguments:;
          goto sorry_ex;
        }
        Findjob_set_action_type(job, 39, type, 0);
+     } else if(strcmp(cpt, "estimate_size")==0) {
+       Findjob_set_action_target(job, 40, NULL, 0);
      } else {
        sprintf(xorriso->info_text, "-find -exec: unknown action %s",
                Text_shellsafe(argv[i], sfe, 0));
@@ -1041,6 +1043,15 @@ ex:;
                              xorriso->pacifier_count, 0, "", 1);
  if(first_job->action == 35 && !(flag & 1))
    Xorriso_report_md5_outcome(xorriso, first_job->target, 0);
+ if(first_job->action == 40) {
+   sprintf(xorriso->result_line,"Size lower   : %lus\n",
+          (unsigned long) (job->estim_lower_size / (off_t) 2048));
+   Xorriso_result(xorriso,0);
+   sprintf(xorriso->result_line,"Size upper   : %lus\n",
+          (unsigned long) ((job->estim_upper_size / (off_t) 2048) +
+                           !!(job->estim_upper_size % 2048)));
+   Xorriso_result(xorriso,0);
+ }
  if(access_acl_text != NULL)
    free(access_acl_text);
  if(default_acl_text != NULL)
diff --git a/libisoburn/trunk/xorriso/xorriso.1 b/libisoburn/trunk/xorriso/xorriso.1
index 69686dce..bb3807ff 100644
--- a/libisoburn/trunk/xorriso/xorriso.1
+++ b/libisoburn/trunk/xorriso/xorriso.1
@@ -1712,6 +1712,12 @@ E.g.:
 .br
   -find / -disk_name *_secret -exec hide on
 .br
+\fBestimate_size\fR
+prints a lower and an upper estimation of the number of blocks which the
+found files together will occupy in the emering ISO image.
+This does not account for the superblock,
+for the directories in the -find path, or for image padding.
+.br
 \fBfind\fR
 performs another run of -find on the matching file address.
 It accepts the same params as -find, except iso_rr_path.
diff --git a/libisoburn/trunk/xorriso/xorriso.info b/libisoburn/trunk/xorriso/xorriso.info
index 0ca92f13..0c456412 100644
--- a/libisoburn/trunk/xorriso/xorriso.info
+++ b/libisoburn/trunk/xorriso/xorriso.info
@@ -1538,6 +1538,11 @@ File: xorriso.info,  Node: CmdFind,  Next: Filter,  Prev: Manip,  Up: Options
           "joliet", "off".
           E.g.:
           -find / -disk_name *_secret -exec hide on
+    estimate_size
+          prints a lower and an upper estimation of the number of
+          blocks which the found files together will occupy in the
+          emering ISO image.  This does not account for the superblock,
+          for the directories in the -find path, or for image padding.
     find
           performs another run of -find on the matching file address.
           It accepts the same params as -find, except iso_rr_path.
@@ -4370,42 +4375,42 @@ Node: Insert40593
 Node: SetInsert48950
 Node: Manip57517
 Node: CmdFind66198
-Node: Filter76149
-Node: Writing80498
-Node: SetWrite86787
-Node: Bootable98738
-Node: Jigdo111045
-Node: Charset115303
-Node: Exception118054
-Node: DialogCtl122569
-Node: Inquiry124914
-Node: Navigate129044
-Node: Verify136642
-Node: Restore145062
-Node: Emulation151718
-Node: Scripting160007
-Node: Frontend165569
-Node: Examples166864
-Node: ExDevices168033
-Node: ExCreate168667
-Node: ExDialog169941
-Node: ExGrowing171203
-Node: ExModifying172005
-Node: ExBootable172506
-Node: ExCharset173053
-Node: ExPseudo173881
-Node: ExCdrecord174775
-Node: ExMkisofs175090
-Node: ExGrowisofs176093
-Node: ExException177217
-Node: ExTime177671
-Node: ExIncBackup178130
-Node: ExRestore181602
-Node: ExRecovery182571
-Node: Files183137
-Node: Seealso184365
-Node: Legal184889
-Node: CommandIdx185811
-Node: ConceptIdx200036
+Node: Filter76443
+Node: Writing80792
+Node: SetWrite87081
+Node: Bootable99032
+Node: Jigdo111339
+Node: Charset115597
+Node: Exception118348
+Node: DialogCtl122863
+Node: Inquiry125208
+Node: Navigate129338
+Node: Verify136936
+Node: Restore145356
+Node: Emulation152012
+Node: Scripting160301
+Node: Frontend165863
+Node: Examples167158
+Node: ExDevices168327
+Node: ExCreate168961
+Node: ExDialog170235
+Node: ExGrowing171497
+Node: ExModifying172299
+Node: ExBootable172800
+Node: ExCharset173347
+Node: ExPseudo174175
+Node: ExCdrecord175069
+Node: ExMkisofs175384
+Node: ExGrowisofs176387
+Node: ExException177511
+Node: ExTime177965
+Node: ExIncBackup178424
+Node: ExRestore181896
+Node: ExRecovery182865
+Node: Files183431
+Node: Seealso184659
+Node: Legal185183
+Node: CommandIdx186105
+Node: ConceptIdx200330
 
 End Tag Table
diff --git a/libisoburn/trunk/xorriso/xorriso.texi b/libisoburn/trunk/xorriso/xorriso.texi
index 3fdaf600..327b1b89 100644
--- a/libisoburn/trunk/xorriso/xorriso.texi
+++ b/libisoburn/trunk/xorriso/xorriso.texi
@@ -2077,6 +2077,12 @@ E.g.:
 @*
   -find / -disk_name *_secret -exec hide on
 @*
+@item estimate_size
+prints a lower and an upper estimation of the number of blocks which the
+found files together will occupy in the emering ISO image.
+This does not account for the superblock,
+for the directories in the -find path, or for image padding.
+@*
 @item find
 performs another run of -find on the matching file address.
 It accepts the same params as -find, except iso_rr_path.
diff --git a/libisoburn/trunk/xorriso/xorriso_timestamp.h b/libisoburn/trunk/xorriso/xorriso_timestamp.h
index 74dff69a..0ac6653b 100644
--- a/libisoburn/trunk/xorriso/xorriso_timestamp.h
+++ b/libisoburn/trunk/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2010.12.02.063209"
+#define Xorriso_timestamP "2010.12.02.111029"
diff --git a/libisoburn/trunk/xorriso/xorrisoburn.h b/libisoburn/trunk/xorriso/xorrisoburn.h
index 964a8c75..e707e249 100644
--- a/libisoburn/trunk/xorriso/xorrisoburn.h
+++ b/libisoburn/trunk/xorriso/xorrisoburn.h
@@ -552,5 +552,9 @@ int Xorriso_preparer_string(struct XorrisO *xorriso, char xorriso_id[129],
 int Xorriso_jigdo_interpreter(struct XorrisO *xorriso, char *aspect, char *arg,
                               int flag);
 
+
+int Xorriso_estimate_file_size(struct XorrisO *xorriso, struct FindjoB *job,
+                      char *basename, mode_t st_mode, off_t st_size, int flag);
+
 #endif /* Xorrisoburn_includeD */