diff --git a/upcoming_changelogs/6993.md b/upcoming_changelogs/6993.md
new file mode 100644
index 000000000000..75a11f2635fe
--- /dev/null
+++ b/upcoming_changelogs/6993.md
@@ -0,0 +1,7 @@
+- `EuiBasicTable`, `EuiInMemoryTable`, and `EuiDataGrid` now allow `pagination.pageSize` to be undefined. If undefined, `pageSize` defaults to `EuiTablePagination`'s `itemsPerPage` component default.
+- `EuiBasicTable`, `EuiInMemoryTable`, and `EuiDataGrid`'s `pagination.pageSizeOptions` will now fall back to `EuiTablePagination`'s `itemsPerPageOptions` component default.
+
+**Breaking changes**
+
+- `EuiTablePagination`'s default `itemsPerPage` is now `10` (was previously `50`). This can be configured through `EuiProvider.componentDefaults`.
+- `EuiTablePagination`'s default `itemsPerPageOptions` is now `[10, 25, 50]` (was previously `[10, 20, 50, 100]`). This can be configured through `EuiProvider.componentDefaults`.