diff --git a/src/GridItem.ts b/src/GridItem.ts
index f92f391..daaff88 100644
--- a/src/GridItem.ts
+++ b/src/GridItem.ts
@@ -28,7 +28,7 @@ export interface GridItemStatus {
   mountState?: MOUNT_STATE;
   updateState?: UPDATE_STATE;
   isFirstUpdate?: boolean;
-  attributes?: Record<string, string>;
+  attributes?: Record<string, any>;
   orgCSSText?: string;
   orgRect?: Required<DOMRect>;
   rect?: Required<DOMRect>;
diff --git a/src/ItemRenderer.ts b/src/ItemRenderer.ts
index 9807062..77f94a7 100644
--- a/src/ItemRenderer.ts
+++ b/src/ItemRenderer.ts
@@ -67,7 +67,7 @@ export class ItemRenderer {
       if (updatedItem) {
         totalItems.forEach((item) => {
           if (items.indexOf(item) === -1) {
-            this._updateItem(item, true);
+            this.updateItem(item, true);
           }
         });
       }
@@ -75,7 +75,7 @@ export class ItemRenderer {
   }
   public updateItems(items: GridItem[]) {
     items.forEach((item) => {
-      this._updateItem(item);
+      this.updateItem(item);
     });
   }
   public getStatus(): ItemRendererStatus {
@@ -107,7 +107,7 @@ export class ItemRenderer {
     this.posPercetage = posPercentage;
     this.sizePercetage = sizePercentage;
   }
-  private _updateItem(item: GridItem, checkSizeGroup?: boolean) {
+  public updateItem(item: GridItem, checkSizeGroup?: boolean) {
     const { isEqualSize, isConstantSize, useRoundedSize } = this.options;
     const initialRects = this.initialRects;
     const { orgRect, element } = item;
@@ -118,10 +118,10 @@ export class ItemRenderer {
     const attributes: Record<string, string> = element
       ? getDataAttributes(element, this.options.attributePrefix)
       : item.attributes;
-    const sizeGroup = attributes.sizeGroup || "";
+    const sizeGroup = attributes.sizeGroup ?? "";
     const isNotEqualSize = attributes.notEqualSize;
 
-    if (sizeGroup && initialRects[sizeGroup]) {
+    if (sizeGroup !== "" && initialRects[sizeGroup]) {
       rect = initialRects[sizeGroup];
     } else if (isEqualSize && !isNotEqualSize && !sizeGroup && initialRects[""]) {
       rect = initialRects[""];
diff --git a/test/unit/ItemRenderer.spec.ts b/test/unit/ItemRenderer.spec.ts
index 9fb2591..0a53b37 100644
--- a/test/unit/ItemRenderer.spec.ts
+++ b/test/unit/ItemRenderer.spec.ts
@@ -358,7 +358,6 @@ describe("test ItemRenderer", () => {
       }
     });
   });
-
   it(`should check get status and restore status`, () => {
     // Given
     el.style.cssText = "position: absolute; left: 50px; top: 50px; width: 200px; height: 100px;";
@@ -422,4 +421,44 @@ describe("test ItemRenderer", () => {
       "test": "data-grid-test",
     });
   });
+  it("should check if width and height are entered by sizeGroup", () => {
+    // Given
+    itemRenderer = new ItemRenderer({
+      horizontal: false,
+    });
+
+    itemRenderer.setStatus({
+      initialRects: {
+        "0": {
+          left: 0,
+          top: 0,
+          width: 100,
+          height: 100,
+        },
+      },
+    });
+
+    const item1 = new GridItem(false, {
+      attributes: {
+        sizeGroup: 0,
+      },
+    });
+    const item2 = new GridItem(false, {
+      attributes: {
+        sizeGroup: 1,
+      },
+    });
+
+    // When
+    // update
+    itemRenderer.updateItem(item1, true);
+
+    // not update
+    itemRenderer.updateItem(item2, true);
+
+    // Then
+    expect(item1.rect.width).to.be.deep.equals(100);
+    expect(item2.rect.width).to.be.deep.equals(0);
+  });
+
 });