diff --git a/04_FormatStick.cmd b/04_FormatStick.cmd
index 7947270..1bbdf78 100644
--- a/04_FormatStick.cmd
+++ b/04_FormatStick.cmd
@@ -41,6 +41,7 @@ set DISK=
 
 set FS=
 :askfs
+  echo.
   set /p FS="Please select filesystem (exfat or fat32) [exfat]: "
   if /i "%FS%" EQU "fat32" (
     GOTO CONT2
@@ -57,6 +58,27 @@ set FS=
 :CONT2
 echo selected: %FS%
 
+set SIZE=
+:asksize
+  echo.
+  echo IMPORTANT: maximum size for FAT32 is 32768!
+  set /p SIZE="Please enter size in MB [max]: "
+
+  if /i "%SIZE%" EQU "" (
+    GOTO CONT3
+  )
+
+  echo %SIZE%| findstr /r "^[1-9][0-9]*$">nul
+  if %errorlevel% neq 0 (
+    echo Please enter an integer number!
+    goto asksize
+  ) else (
+    echo selected size = %SIZE% [MB]
+    set SIZE=size=%SIZE%
+  )
+:CONT3
+
+echo.
 set LABEL=
 set /p LABEL="Please enter a label for the new disk: "
 
@@ -85,7 +107,7 @@ rem =====
   @echo.select disk %DISK%
   @echo.clean
   @echo.convert MBR
-  @echo.create partition primary
+  @echo.create partition primary %SIZE%
   @echo.select partition 1
   @echo.format fs="%FS%" LABEL="%LABEL%" quick
   @echo.active