diff --git a/spec/PUGX/Poser/Calculator/SvgTextSizeCalculatorSpec.php b/spec/PUGX/Poser/Calculator/SvgTextSizeCalculatorSpec.php
index 56120e0..7930d3b 100644
--- a/spec/PUGX/Poser/Calculator/SvgTextSizeCalculatorSpec.php
+++ b/spec/PUGX/Poser/Calculator/SvgTextSizeCalculatorSpec.php
@@ -8,8 +8,8 @@ class SvgTextSizeCalculatorSpec extends ObjectBehavior
 {
     public function it_should_compute_text_width(): void
     {
-        $this->calculateWidth('MIT', 8)->shouldBeLike(25);
-        $this->calculateWidth('MIT', 10)->shouldBeLike(29);
-        $this->calculateWidth('MIT', 14)->shouldBeLike(36);
+        $this->calculateWidth('MIT', 8)->shouldBeLike(24.1);
+        $this->calculateWidth('MIT', 10)->shouldBeLike(27.7);
+        $this->calculateWidth('MIT', 14)->shouldBeLike(34.8);
     }
 }
diff --git a/src/Calculator/SvgTextSizeCalculator.php b/src/Calculator/SvgTextSizeCalculator.php
index b740ba9..887fa3c 100644
--- a/src/Calculator/SvgTextSizeCalculator.php
+++ b/src/Calculator/SvgTextSizeCalculator.php
@@ -19,8 +19,6 @@
  */
 class SvgTextSizeCalculator implements TextSizeCalculatorInterface
 {
-    private const SHIELD_PADDING_X = 11;
-
     /**
      * Calculate the width of the text box.
      */
@@ -36,6 +34,8 @@ public function calculateWidth(string $text, int $size = self::TEXT_SIZE): float
             $letterSpacing,
         );
 
-        return \round($width + self::SHIELD_PADDING_X, 0);
+        $shieldPaddingX = self::SHIELD_PADDING_EXTERNAL + self::SHIELD_PADDING_INTERNAL;
+
+        return \round($width + $shieldPaddingX, 1);
     }
 }