diff --git a/Libraries/LibWeb/HTML/HTMLLinkElement.cpp b/Libraries/LibWeb/HTML/HTMLLinkElement.cpp
index 79906b42cbf..4c9a38d7584 100644
--- a/Libraries/LibWeb/HTML/HTMLLinkElement.cpp
+++ b/Libraries/LibWeb/HTML/HTMLLinkElement.cpp
@@ -124,6 +124,15 @@ GC::Ref<DOM::DOMTokenList> HTMLLinkElement::rel_list()
     return *m_rel_list;
 }
 
+// https://html.spec.whatwg.org/multipage/semantics.html#dom-link-sizes
+GC::Ref<DOM::DOMTokenList> HTMLLinkElement::sizes()
+{
+    // The size IDL attribute must reflect the size content attribute.
+    if (!m_sizes)
+        m_sizes = DOM::DOMTokenList::create(*this, HTML::AttributeNames::sizes);
+    return *m_sizes;
+}
+
 bool HTMLLinkElement::has_loaded_icon() const
 {
     return m_relationship & Relationship::Icon && resource() && resource()->is_loaded() && resource()->has_encoded_data();
@@ -616,6 +625,7 @@ void HTMLLinkElement::visit_edges(Cell::Visitor& visitor)
     visitor.visit(m_fetch_controller);
     visitor.visit(m_loaded_style_sheet);
     visitor.visit(m_rel_list);
+    visitor.visit(m_sizes);
 }
 
 }
diff --git a/Libraries/LibWeb/HTML/HTMLLinkElement.h b/Libraries/LibWeb/HTML/HTMLLinkElement.h
index 11defb3d60e..09398005c16 100644
--- a/Libraries/LibWeb/HTML/HTMLLinkElement.h
+++ b/Libraries/LibWeb/HTML/HTMLLinkElement.h
@@ -37,6 +37,7 @@ public:
     WebIDL::ExceptionOr<void> set_as(String const&);
 
     GC::Ref<DOM::DOMTokenList> rel_list();
+    GC::Ref<DOM::DOMTokenList> sizes();
 
     bool has_loaded_icon() const;
     bool load_favicon_and_use_if_window_is_active();
@@ -146,6 +147,7 @@ private:
 
     Optional<DOM::DocumentLoadEventDelayer> m_document_load_event_delayer;
     GC::Ptr<DOM::DOMTokenList> m_rel_list;
+    GC::Ptr<DOM::DOMTokenList> m_sizes;
     unsigned m_relationship { 0 };
     // https://html.spec.whatwg.org/multipage/semantics.html#explicitly-enabled
     bool m_explicitly_enabled { false };
diff --git a/Libraries/LibWeb/HTML/HTMLLinkElement.idl b/Libraries/LibWeb/HTML/HTMLLinkElement.idl
index 990ba0de8bd..0fe41bdbd9a 100644
--- a/Libraries/LibWeb/HTML/HTMLLinkElement.idl
+++ b/Libraries/LibWeb/HTML/HTMLLinkElement.idl
@@ -18,7 +18,7 @@ interface HTMLLinkElement : HTMLElement {
     [CEReactions, Reflect] attribute DOMString integrity;
     [CEReactions, Reflect] attribute DOMString hreflang;
     [CEReactions, Reflect] attribute DOMString type;
-    [FIXME, SameObject, PutForwards=value] readonly attribute DOMTokenList sizes;
+    [SameObject, PutForwards=value] readonly attribute DOMTokenList sizes;
     [CEReactions, Reflect=imagesrcset] attribute USVString imageSrcset;
     [CEReactions, Reflect=imagesizes] attribute DOMString imageSizes;
     [CEReactions, Reflect=referrerpolicy, Enumerated=ReferrerPolicy] attribute DOMString referrerPolicy;
diff --git a/Tests/LibWeb/Text/expected/wpt-import/dom/lists/DOMTokenList-coverage-for-attributes.txt b/Tests/LibWeb/Text/expected/wpt-import/dom/lists/DOMTokenList-coverage-for-attributes.txt
index e71b9bb75c0..9502f336e27 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/dom/lists/DOMTokenList-coverage-for-attributes.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/dom/lists/DOMTokenList-coverage-for-attributes.txt
@@ -6,8 +6,8 @@ Rerun
 
 Found 175 tests
 
-173 Pass
-2 Fail
+174 Pass
+1 Fail
 Details
 Result	Test Name	MessagePass	a.classList in http://www.w3.org/1999/xhtml namespace should be DOMTokenList.	
 Pass	area.classList in http://www.w3.org/1999/xhtml namespace should be DOMTokenList.	
@@ -151,7 +151,7 @@ Pass	td.sandbox in null namespace should be undefined.
 Pass	th.sandbox in null namespace should be undefined.	
 Pass	a.sizes in http://www.w3.org/1999/xhtml namespace should be undefined.	
 Pass	area.sizes in http://www.w3.org/1999/xhtml namespace should be undefined.	
-Fail	link.sizes in http://www.w3.org/1999/xhtml namespace should be DOMTokenList.	
+Pass	link.sizes in http://www.w3.org/1999/xhtml namespace should be DOMTokenList.	
 Pass	iframe.sizes in http://www.w3.org/1999/xhtml namespace should be undefined.	
 Pass	output.sizes in http://www.w3.org/1999/xhtml namespace should be undefined.	
 Pass	td.sizes in http://www.w3.org/1999/xhtml namespace should be undefined.