diff --git a/AMESCoreStudio.WebApi/Models/AMES/OutfitVarityInfo.cs b/AMESCoreStudio.WebApi/Models/AMES/OutfitVarityInfo.cs
index 1e279488..b9a40f1a 100644
--- a/AMESCoreStudio.WebApi/Models/AMES/OutfitVarityInfo.cs
+++ b/AMESCoreStudio.WebApi/Models/AMES/OutfitVarityInfo.cs
@@ -35,7 +35,7 @@ namespace AMESCoreStudio.WebApi.Models.AMES
         /// 規格代碼
         /// </summary>
         [Column("VARIETY_NO")]
-        [StringLength(5)]
+        [StringLength(4)]
         [DataMember]
         [Required]
         [Display(Name = "規格代碼")]