diff --git a/src/main/java/com/example/building/entity/Product.java b/src/main/java/com/example/building/entity/Product.java
index 8367861..1715ca0 100644
--- a/src/main/java/com/example/building/entity/Product.java
+++ b/src/main/java/com/example/building/entity/Product.java
@@ -43,6 +43,21 @@ public class Product {
      */
     private BigDecimal price;
 
+    /**
+     * 长度(mm)
+     */
+    private BigDecimal length;
+
+    /**
+     * 宽度(mm)
+     */
+    private BigDecimal width;
+
+    /**
+     * 面积(m²)
+     */
+    private BigDecimal area;
+
     /**
      * 成本价
      */
diff --git a/src/main/resources/db/migration/V13__add_product_size_fields.sql b/src/main/resources/db/migration/V13__add_product_size_fields.sql
new file mode 100644
index 0000000..1cf0edf
--- /dev/null
+++ b/src/main/resources/db/migration/V13__add_product_size_fields.sql
@@ -0,0 +1,4 @@
+-- 添加商品长度、宽度、面积字段
+ALTER TABLE products ADD COLUMN length DECIMAL(10,2) COMMENT '长度(mm)';
+ALTER TABLE products ADD COLUMN width DECIMAL(10,2) COMMENT '宽度(mm)';
+ALTER TABLE products ADD COLUMN area DECIMAL(10,4) COMMENT '面积(m²)';
\ No newline at end of file