diff --git a/Userland/Libraries/LibWeb/CSS/Length.cpp b/Userland/Libraries/LibWeb/CSS/Length.cpp
index 8283739455..3edf6e7b16 100644
--- a/Userland/Libraries/LibWeb/CSS/Length.cpp
+++ b/Userland/Libraries/LibWeb/CSS/Length.cpp
@@ -21,6 +21,9 @@ float Length::relative_length_to_px(const Layout::Node& layout_node) const
         return m_value * layout_node.font().x_height();
     case Type::Em:
         return m_value * layout_node.font_size();
+    case Type::Ch:
+        // FIXME: Use layout_node.font().glyph_height() when writing-mode is not horizontal-tb (it has to be implemented first)
+        return m_value * (layout_node.font().glyph_width('0') + layout_node.font().glyph_spacing());
     case Type::Rem:
         return m_value * layout_node.document().document_element()->layout_node()->font_size();
     case Type::Vw:
@@ -180,6 +183,8 @@ const char* Length::unit_name() const
         return "ex";
     case Type::Em:
         return "em";
+    case Type::Ch:
+        return "ch";
     case Type::Rem:
         return "rem";
     case Type::Auto:
diff --git a/Userland/Libraries/LibWeb/CSS/Length.h b/Userland/Libraries/LibWeb/CSS/Length.h
index 5e14e11818..90e1c0b283 100644
--- a/Userland/Libraries/LibWeb/CSS/Length.h
+++ b/Userland/Libraries/LibWeb/CSS/Length.h
@@ -27,6 +27,7 @@ public:
         Pc,
         Ex,
         Em,
+        Ch,
         Rem,
         Vh,
         Vw,
@@ -93,6 +94,7 @@ public:
     {
         return m_type == Type::Ex
             || m_type == Type::Em
+            || m_type == Type::Ch
             || m_type == Type::Rem
             || m_type == Type::Vh
             || m_type == Type::Vw
diff --git a/Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp b/Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
index 0f4c91d823..b4e240e89a 100644
--- a/Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
+++ b/Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
@@ -1466,6 +1466,8 @@ Optional<Length> Parser::parse_length(ParsingContext const& context, StyleCompon
             type = Length::Type::Em;
         } else if (unit_string.equals_ignoring_case("ex")) {
             type = Length::Type::Ex;
+        } else if (unit_string.equals_ignoring_case("ch")) {
+            type = Length::Type::Ch;
         } else if (unit_string.equals_ignoring_case("vw")) {
             type = Length::Type::Vw;
         } else if (unit_string.equals_ignoring_case("vh")) {