diff --git a/frontend/components/v2/config-panels/V2ItemRoutingConfigPanel.tsx b/frontend/components/v2/config-panels/V2ItemRoutingConfigPanel.tsx
index 851d90fe..6b85429b 100644
--- a/frontend/components/v2/config-panels/V2ItemRoutingConfigPanel.tsx
+++ b/frontend/components/v2/config-panels/V2ItemRoutingConfigPanel.tsx
@@ -180,12 +180,13 @@ function ScreenCombobox({ value, onChange }: { value?: number; onChange: (v?: nu
 }
 
 // ─── 컬럼 편집 카드 (품목/모달/공정 공용) ───
-function ColumnEditor({ columns, onChange, tableName, title, icon }: {
+function ColumnEditor({ columns, onChange, tableName, title, icon, extraContent }: {
   columns: ColumnDef[];
   onChange: (cols: ColumnDef[]) => void;
   tableName: string;
   title: string;
   icon: React.ReactNode;
+  extraContent?: React.ReactNode;
 }) {
   const [open, setOpen] = useState(false);
 
@@ -263,6 +264,7 @@ function ColumnEditor({ columns, onChange, tableName, title, icon }: {
           <Button variant="outline" size="sm" className="h-7 w-full gap-1 text-xs border-dashed" onClick={addColumn}>
             <Plus className="h-3 w-3" /> 컬럼 추가
           </Button>
+          {extraContent}
         </div>
       </CollapsibleContent>
     </Collapsible>
@@ -378,13 +380,34 @@ export const V2ItemRoutingConfigPanel: React.FC<V2ItemRoutingConfigPanelProps> =
         icon={<Eye className="h-4 w-4 text-muted-foreground" />}
       />
 
-      {/* ─── 모달 표시 컬럼 (등록 모드에서만 의미 있지만 항상 설정 가능) ─── */}
+      {/* ─── 품목 추가 모달 (컬럼 + 크기 설정) ─── */}
       <ColumnEditor
         columns={config.modalDisplayColumns || []}
         onChange={(cols) => update({ modalDisplayColumns: cols })}
         tableName={config.dataSource.itemTable}
-        title="품목 추가 모달 컬럼"
+        title="품목 추가 모달"
         icon={<Columns className="h-4 w-4 text-muted-foreground" />}
+        extraContent={
+          <div className="mt-3 space-y-2 border-t pt-3">
+            <span className="text-[10px] font-medium text-muted-foreground">모달 크기 (px)</span>
+            <div className="grid grid-cols-2 gap-2">
+              <div className="space-y-0.5">
+                <span className="text-[10px] text-muted-foreground">가로 (너비)</span>
+                <Input type="number" min={300} max={1600}
+                  value={parseInt(config.addModalMaxWidth || "600")}
+                  onChange={(e) => update({ addModalMaxWidth: `${e.target.value}px` })}
+                  placeholder="600" className="h-7 text-xs" />
+              </div>
+              <div className="space-y-0.5">
+                <span className="text-[10px] text-muted-foreground">세로 (목록 높이)</span>
+                <Input type="number" min={150} max={900}
+                  value={parseInt(config.addModalListMaxHeight || "340")}
+                  onChange={(e) => update({ addModalListMaxHeight: `${e.target.value}px` })}
+                  placeholder="340" className="h-7 text-xs" />
+              </div>
+            </div>
+          </div>
+        }
       />
 
       {/* ─── 품목 필터 조건 ─── */}
diff --git a/frontend/lib/registry/components/v2-item-routing/ItemRoutingComponent.tsx b/frontend/lib/registry/components/v2-item-routing/ItemRoutingComponent.tsx
index d0144d0b..53717003 100644
--- a/frontend/lib/registry/components/v2-item-routing/ItemRoutingComponent.tsx
+++ b/frontend/lib/registry/components/v2-item-routing/ItemRoutingComponent.tsx
@@ -458,7 +458,7 @@ export function ItemRoutingComponent({
 
       {/* ════ 품목 추가 다이얼로그 (테이블 형태 + 검색) ════ */}
       <Dialog open={addDialogOpen} onOpenChange={setAddDialogOpen}>
-        <DialogContent className="max-w-[95vw] sm:max-w-[600px]">
+        <DialogContent className="max-w-[95vw]" style={{ maxWidth: `min(95vw, ${config.addModalMaxWidth || "600px"})` }}>
           <DialogHeader>
             <DialogTitle className="text-base sm:text-lg">품목 추가</DialogTitle>
             <DialogDescription className="text-xs sm:text-sm">
@@ -481,14 +481,14 @@ export function ItemRoutingComponent({
             </Button>
           </div>
 
-          <div className="max-h-[340px] overflow-auto rounded-md border">
+          <div className="overflow-auto rounded-md border" style={{ maxHeight: config.addModalListMaxHeight || "340px" }}>
             {allItems.length === 0 ? (
               <div className="flex items-center justify-center py-8">
                 <p className="text-xs text-muted-foreground">품목이 없습니다</p>
               </div>
             ) : (
-              <Table>
-                <TableHeader>
+              <Table noWrapper>
+                <TableHeader className="sticky top-0 z-10 bg-background shadow-[0_1px_0_0_hsl(var(--border))]">
                   <TableRow>
                     <TableHead className="w-[40px] text-center text-[11px] py-1.5" />
                     {modalDisplayCols.map((col) => (
diff --git a/frontend/lib/registry/components/v2-item-routing/types.ts b/frontend/lib/registry/components/v2-item-routing/types.ts
index 08fe73c2..23a3a39b 100644
--- a/frontend/lib/registry/components/v2-item-routing/types.ts
+++ b/frontend/lib/registry/components/v2-item-routing/types.ts
@@ -64,6 +64,10 @@ export interface ItemRoutingConfig {
   modalDisplayColumns?: ColumnDef[];
   /** 품목 조회 시 사전 필터 조건 */
   itemFilterConditions?: ItemFilterCondition[];
+  /** 품목 추가 모달 최대 너비 (px 또는 vw, 기본: 600px) */
+  addModalMaxWidth?: string;
+  /** 품목 추가 모달 목록 최대 높이 (px, 기본: 340px) */
+  addModalListMaxHeight?: string;
 }
 
 // 컴포넌트 Props