diff --git a/packages/eui/changelogs/upcoming/8646.md b/packages/eui/changelogs/upcoming/8646.md
new file mode 100644
index 00000000000..761d8f58ffe
--- /dev/null
+++ b/packages/eui/changelogs/upcoming/8646.md
@@ -0,0 +1 @@
+- Update `EuiDataGrid` to use `expand` glyph
diff --git a/packages/eui/src/components/datagrid/body/cell/data_grid_cell_actions.styles.ts b/packages/eui/src/components/datagrid/body/cell/data_grid_cell_actions.styles.ts
index 6378acc53e1..8947d322cf2 100644
--- a/packages/eui/src/components/datagrid/body/cell/data_grid_cell_actions.styles.ts
+++ b/packages/eui/src/components/datagrid/body/cell/data_grid_cell_actions.styles.ts
@@ -122,12 +122,6 @@ export const euiDataGridCellActionsStyles = (euiThemeContext: UseEuiTheme) => {
       }
       /* stylelint-enable declaration-no-important */
 
-      /* Manually increase the size of the expand cell icon - it's a bit small by default */
-      &.euiDataGridRowCell__expandCell .euiIcon {
-        ${logicalCSS('width', '120%')}
-        ${logicalCSS('height', '100%')}
-      }
-
       /* Remove button borders in high contrast mode */
       ${highContrastModeStyles(euiThemeContext, {
         preferred: 'border: none;',
diff --git a/packages/eui/src/components/datagrid/body/cell/data_grid_cell_actions.test.tsx b/packages/eui/src/components/datagrid/body/cell/data_grid_cell_actions.test.tsx
index d41797821f1..8b226a248b1 100644
--- a/packages/eui/src/components/datagrid/body/cell/data_grid_cell_actions.test.tsx
+++ b/packages/eui/src/components/datagrid/body/cell/data_grid_cell_actions.test.tsx
@@ -47,7 +47,7 @@ describe('EuiDataGridCellActions', () => {
           aria-hidden="true"
           class="euiButtonIcon__icon"
           color="inherit"
-          data-euiicon-type="expandMini"
+          data-euiicon-type="expand"
         />
       </button>
     `);
diff --git a/packages/eui/src/components/datagrid/body/cell/data_grid_cell_actions.tsx b/packages/eui/src/components/datagrid/body/cell/data_grid_cell_actions.tsx
index 6317d672c88..784451fe949 100644
--- a/packages/eui/src/components/datagrid/body/cell/data_grid_cell_actions.tsx
+++ b/packages/eui/src/components/datagrid/body/cell/data_grid_cell_actions.tsx
@@ -58,8 +58,8 @@ export const EuiDataGridCellActions = ({
             data-test-subj="euiDataGridCellExpandButton"
             display="fill"
             color="primary"
-            iconSize="m"
-            iconType="expandMini"
+            iconSize="s"
+            iconType="expand"
             aria-hidden
             onClick={onExpandClick}
             title={expandButtonTitle}
diff --git a/packages/website/docs/components/tabular-content/data-grid/cells-and-popovers.mdx b/packages/website/docs/components/tabular-content/data-grid/cells-and-popovers.mdx
index c18c349f2a6..b266721a879 100644
--- a/packages/website/docs/components/tabular-content/data-grid/cells-and-popovers.mdx
+++ b/packages/website/docs/components/tabular-content/data-grid/cells-and-popovers.mdx
@@ -787,7 +787,8 @@ export default () => {
         <EuiFlexGroup alignItems="center" gutterSize="xs" responsive={false}>
           <EuiFlexItem grow={false}>
             <EuiToken
-              iconType="expandMini"
+              iconSize="s"
+              iconType="expand"
               color="euiColorVis0"
               shape="square"
               fill="dark"
@@ -822,7 +823,8 @@ export default () => {
         <EuiFlexGroup alignItems="center" gutterSize="xs" responsive={false}>
           <EuiFlexItem grow={false}>
             <EuiToken
-              iconType="expandMini"
+              iconSize="s"
+              iconType="expand"
               color="euiColorVis0"
               shape="square"
               fill="dark"
@@ -862,7 +864,8 @@ export default () => {
         <EuiFlexGroup alignItems="center" gutterSize="xs" responsive={false}>
           <EuiFlexItem grow={false}>
             <EuiToken
-              iconType="expandMini"
+              iconSize="s"
+              iconType="expand"
               color="euiColorVis0"
               shape="square"
               fill="dark"