diff --git a/core/modules/field/config/schema/field.schema.yml b/core/modules/field/config/schema/field.schema.yml
new file mode 100644
index 0000000..b9e51d6
--- /dev/null
+++ b/core/modules/field/config/schema/field.schema.yml
@@ -0,0 +1,9 @@
+# Schema for configuration files of the Field module.
+
+field.settings:
+  type: mapping
+  label: 'Field settings'
+  mapping:
+    purge_batch_size:
+      type: integer
+      label: 'Maximum number of field data records to purge'