diff --git a/src/Strings/Multibyte/OmniString.php b/src/Strings/Multibyte/OmniString.php
index d4f7d3e..28559e6 100644
--- a/src/Strings/Multibyte/OmniString.php
+++ b/src/Strings/Multibyte/OmniString.php
@@ -1,76 +1,80 @@
 <?php
 declare(strict_types=1);
 
 namespace Keruald\OmniTools\Strings\Multibyte;
 
 class OmniString {
 
     use WithEncoding;
 
     ///
     /// Private members
     ///
 
     /**
      * @var string
      */
     private $value;
 
     ///
     /// Constructor
     ///
 
     public function __construct (string $value = '', string $encoding = '') {
         $this->value = $value;
         $this->setEncoding($encoding ?: "UTF-8");
     }
 
     ///
     /// Magic methods
     ///
 
     public function __toString() : string {
         return $this->value;
     }
 
     ///
     /// Helper methods
     ///
 
     public function pad(
         int $padLength = 0,
         string $padString = ' ',
         int $padType = STR_PAD_RIGHT
     ) : string {
         return (new StringPad)
             ->setInput($this->value)
             ->setEncoding($this->encoding)
             ->setPadLength($padLength)
             ->setPadString($padString)
             ->setPadType($padType)
             ->pad();
     }
 
     public function startsWith (string $start) : bool {
         return StringUtilities::startsWith($this->value, $start);
     }
 
     public function endsWith (string $end) : bool {
         return StringUtilities::endsWith($this->value, $end);
     }
 
+    public function len () : int {
+        return mb_strlen($this->value, $this->encoding);
+    }
+
     /**
      * @return string
      */
     public function getValue () : string {
         return $this->value;
     }
 
     /**
      * @param string $value
      */
     public function setValue (string $value) {
         $this->value = $value;
     }
 
 }
diff --git a/tests/Strings/Multibyte/OmniStringTest.php b/tests/Strings/Multibyte/OmniStringTest.php
index ee72c2e..d9b30da 100644
--- a/tests/Strings/Multibyte/OmniStringTest.php
+++ b/tests/Strings/Multibyte/OmniStringTest.php
@@ -1,48 +1,52 @@
 <?php
 declare(strict_types=1);
 
 namespace Keruald\OmniTools\Tests\Strings\Multibyte;
 
 use Keruald\OmniTools\Strings\Multibyte\OmniString;
 use PHPUnit\Framework\TestCase;
 
 class OmniStringTest extends TestCase {
 
     /**
      * @var OmniString
      */
     private $string;
 
     protected function setUp () {
         $this->string = new OmniString("foo");
     }
 
     public function testToString () : void {
         $this->assertEquals("foo", (string)$this->string);
         $this->assertEquals("foo", $this->string->__toString());
     }
 
     public function testPad () : void {
         $paddedString = $this->string->pad(9, '-=-', STR_PAD_BOTH);
         $this->assertEquals("-=-foo-=-", $paddedString);
     }
 
     public function testStartsWith () : void {
         $this->assertTrue($this->string->startsWith("fo"));
         $this->assertTrue($this->string->startsWith(""));
         $this->assertTrue($this->string->startsWith("foo"));
 
         $this->assertFalse($this->string->startsWith("Fo"));
         $this->assertFalse($this->string->startsWith("bar"));
     }
 
     public function testEndsWith () : void {
         $this->assertTrue($this->string->endsWith("oo"));
         $this->assertTrue($this->string->endsWith(""));
         $this->assertTrue($this->string->endsWith("foo"));
 
         $this->assertFalse($this->string->endsWith("oO"));
         $this->assertFalse($this->string->endsWith("bar"));
     }
 
+    public function testLen () : void {
+        $this->assertEquals(3, $this->string->len());
+    }
+
 }