diff --git a/lib/plugins/Invoke-IcingaCheckDirectory.psm1 b/lib/plugins/Invoke-IcingaCheckDirectory.psm1
index 4223eea..76d1092 100644
--- a/lib/plugins/Invoke-IcingaCheckDirectory.psm1
+++ b/lib/plugins/Invoke-IcingaCheckDirectory.psm1
@@ -66,13 +66,16 @@ function Invoke-IcingaCheckDirectory()
       $Warning            = $null,
       [string]$YoungerThan,
       [string]$OlderThan,
+      [string]$FileSizeGreaterThan,
+      [string]$FileSizeSmallerThan,
       [ValidateSet(0, 1, 2, 3)]
       [int]$Verbosity     = 0,
       [switch]$NoPerfData
    );
 
    $DirectoryData  = Get-IcingaDirectoryAll -Path $Path -FileNames $FileNames `
-                     -Recurse $Recurse -YoungerThan $YoungerThan -OlderThan $OlderThan;
+                     -Recurse $Recurse -YoungerThan $YoungerThan -OlderThan $OlderThan `
+                     -FileSizeGreaterThan $FileSizeGreaterThan -FileSizeSmallerThan $FileSizeSmallerThan;
    $DirectoryCheck = New-IcingaCheck -Name 'File Count' -Value $DirectoryData.Count;
 
    $DirectoryCheck.WarnOutOfRange(
diff --git a/lib/provider/directory/Icinga_Provider_Directory.psm1 b/lib/provider/directory/Icinga_Provider_Directory.psm1
index b9994ca..3332b56 100644
--- a/lib/provider/directory/Icinga_Provider_Directory.psm1
+++ b/lib/provider/directory/Icinga_Provider_Directory.psm1
@@ -7,7 +7,9 @@ function Get-IcingaDirectoryAll()
         [array]$FileNames,
         [bool]$Recurse,
         [string]$YoungerThan,
-        [string]$OlderThan
+        [string]$OlderThan,
+        [string]$FileSizeGreaterThan,
+        [string]$FileSizeSmallerThan
     );
 
     if ($Recurse -eq $TRUE) {
@@ -17,16 +19,26 @@ function Get-IcingaDirectoryAll()
     }
     
     if ([string]::IsNullOrEmpty($OlderThan) -eq $FALSE -And [string]::IsNullOrEmpty($YoungerThan) -eq $FALSE) {
-      $OlderThan = Set-NumericNegative (ConvertTo-Seconds $OlderThan);
-      $DirectoryData = ($DirectoryData | Where-Object {$_.LastWriteTime -lt (Get-Date).AddSeconds($OlderThan)})
-      $YoungerThan = Set-NumericNegative (ConvertTo-Seconds $YoungerThan);
-      $DirectoryData = ($DirectoryData | Where-Object {$_.LastWriteTime -gt (Get-Date).AddSeconds($YoungerThan)})
+        $OlderThan = Set-NumericNegative (ConvertTo-Seconds $OlderThan);
+        $DirectoryData = ($DirectoryData | Where-Object {$_.LastWriteTime -lt (Get-Date).AddSeconds($OlderThan)})
+        $YoungerThan = Set-NumericNegative (ConvertTo-Seconds $YoungerThan);
+        $DirectoryData = ($DirectoryData | Where-Object {$_.LastWriteTime -gt (Get-Date).AddSeconds($YoungerThan)})
     } elseif ([string]::IsNullOrEmpty($OlderThan) -eq $FALSE) {
-      $OlderThan = Set-NumericNegative (ConvertTo-Seconds $OlderThan);
-      $DirectoryData = ($DirectoryData | Where-Object {$_.LastWriteTime -lt (Get-Date).AddSeconds($OlderThan)})
+        $OlderThan = Set-NumericNegative (ConvertTo-Seconds $OlderThan);
+        $DirectoryData = ($DirectoryData | Where-Object {$_.LastWriteTime -lt (Get-Date).AddSeconds($OlderThan)})
     } elseif ([string]::IsNullOrEmpty($YoungerThan) -eq $FALSE) {
-      $YoungerThan = Set-NumericNegative (ConvertTo-Seconds $YoungerThan);
-      $DirectoryData = ($DirectoryData | Where-Object {$_.LastWriteTime -gt ((Get-Date).AddSeconds($YoungerThan))})
+        $YoungerThan = Set-NumericNegative (ConvertTo-Seconds $YoungerThan);
+        $DirectoryData = ($DirectoryData | Where-Object {$_.LastWriteTime -gt ((Get-Date).AddSeconds($YoungerThan))})
+    }
+
+    if ([string]::IsNullOrEmpty($FileSizeGreaterThan) -eq $FALSE) {
+        $FileSizeGreaterThanValue = (Convert-Bytes $FileSizeGreaterThan -Unit B).value
+        $DirectoryData = ($DirectoryData | Where-Object {$_.Length -gt $FileSizeGreaterThanValue})
+    }
+
+    if ([string]::IsNullOrEmpty($FileSizeSmallerThan) -eq $FALSE) {
+        $FileSizeSmallerThanValue = (Convert-Bytes $FileSizeSmallerThan -Unit B).value
+        $DirectoryData = ($DirectoryData | Where-Object {$_.Length -gt $FileSizeSmallerThanValue})
     }
 
     return $DirectoryData;