diff --git a/src/main/resources/db/migration/V14__add_order_item_size_fields.sql b/src/main/resources/db/migration/V14__add_order_item_size_fields.sql
new file mode 100644
index 0000000..7c8f5f8
--- /dev/null
+++ b/src/main/resources/db/migration/V14__add_order_item_size_fields.sql
@@ -0,0 +1,7 @@
+-- 添加订单明细长度、宽度、面积字段
+ALTER TABLE order_items ADD COLUMN length DECIMAL(10,2);
+COMMENT ON COLUMN order_items.length IS '长度(mm)';
+ALTER TABLE order_items ADD COLUMN width DECIMAL(10,2);
+COMMENT ON COLUMN order_items.width IS '宽度(mm)';
+ALTER TABLE order_items ADD COLUMN area DECIMAL(10,4);
+COMMENT ON COLUMN order_items.area IS '面积(m²)';
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