diff --git a/src/Humanizer.Tests.Shared/InflectorTests.cs b/src/Humanizer.Tests.Shared/InflectorTests.cs
index 3c688613c..b56bb0c0a 100644
--- a/src/Humanizer.Tests.Shared/InflectorTests.cs
+++ b/src/Humanizer.Tests.Shared/InflectorTests.cs
@@ -92,9 +92,13 @@ public void SingularizeSingleLetter(string input)
         [InlineData("some-title: The beginning", "Some Title: The Beginning")]
         [InlineData("some_title:_the_beginning", "Some Title: the Beginning")]
         [InlineData("some title: The_beginning", "Some Title: The Beginning")]
-        public void Titleize(string input, string expectedOuput)
+        [InlineData("thisIs3.5mmLong", "This Is 3.5mm Long")]
+        [InlineData("thisIs3..5mmLong", "This Is 3.5mm Long")]
+        [InlineData("this Is 3..5mm Long", "This Is 3.5mm Long")]
+        [InlineData("this is 3.5mm long", "This Is 3.5mm Long")]
+        public void Titleize(string input, string expectedOutput)
         {
-            Assert.Equal(expectedOuput, input.Titleize());
+            Assert.Equal(expectedOutput, input.Titleize());
         }
 
         [InlineData("some_title", "some-title")]
diff --git a/src/Humanizer/StringHumanizeExtensions.cs b/src/Humanizer/StringHumanizeExtensions.cs
index 163eeef04..486c106cb 100644
--- a/src/Humanizer/StringHumanizeExtensions.cs
+++ b/src/Humanizer/StringHumanizeExtensions.cs
@@ -13,7 +13,7 @@ public static class StringHumanizeExtensions
 
         static StringHumanizeExtensions()
         {
-            PascalCaseWordPartsRegex = new Regex(@"[\p{Lu}]?[\p{Ll}]+|[0-9]+[\p{Ll}]*|[\p{Lu}]+(?=[\p{Lu}][\p{Ll}]|[0-9]|\b)|[\p{Lo}]+",
+            PascalCaseWordPartsRegex = new Regex(@"[\p{Lu}]?[\p{Ll}]+|([0-9]*(\.*[0-9]+))[\p{Ll}]*|[\p{Lu}]+(?=[\p{Lu}][\p{Ll}]|[0-9]|\b)|[\p{Lo}]+",
                 RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture | RegexOptionsUtil.Compiled);
             FreestandingSpacingCharRegex = new Regex(@"\s[-_]|[-_]\s", RegexOptionsUtil.Compiled);
         }
@@ -32,6 +32,7 @@ private static string FromPascalCase(string input)
                     ? match.Value
                     : match.Value.ToLower()));
 
+            result = Regex.Replace(result, "((?<=[0-9])[\\.]{2,})", ".");
             if (result.Replace(" ", "").ToCharArray().All(c => char.IsUpper(c)) &&
                 result.Contains(" "))
             {