diff --git a/.changeset/polite-pianos-enjoy.md b/.changeset/polite-pianos-enjoy.md
new file mode 100644
index 00000000000..93c38b73338
--- /dev/null
+++ b/.changeset/polite-pianos-enjoy.md
@@ -0,0 +1,5 @@
+---
+"@primer/react": patch
+---
+
+PageLayout: update wrapper dimensions to match PageLayout's root element
diff --git a/packages/react/src/PageLayout/PageLayout.module.css b/packages/react/src/PageLayout/PageLayout.module.css
index 453ccba6ddb..d8cbee7e572 100644
--- a/packages/react/src/PageLayout/PageLayout.module.css
+++ b/packages/react/src/PageLayout/PageLayout.module.css
@@ -70,6 +70,9 @@ body[data-page-layout-dragging='true'] * {
   margin-right: auto;
   margin-left: auto;
   flex-wrap: wrap;
+  /* the wrapper should match the Root's dimensions by default */
+  width: 100%;
+  height: 100%;
 
   &:where([data-width='medium']) {
     max-width: 768px;