diff --git a/src/Eccube/Resource/template/admin/Product/product.twig b/src/Eccube/Resource/template/admin/Product/product.twig
index 3570d07130f..890f698df9d 100644
--- a/src/Eccube/Resource/template/admin/Product/product.twig
+++ b/src/Eccube/Resource/template/admin/Product/product.twig
@@ -76,6 +76,7 @@ file that was distributed with this source code.
                 allowDrop: true,
                 allowReorder: true,
                 labelIdle: '<i class="fa fa-cloud-upload fa-3x text-ec-lightGray mx-3 align-middle" aria-hidden="true" style="font-size: 40px"></i>{{ 'admin.common.drag_and_drop_image_description'|trans }}<span class="filepond--label-action">{{ 'admin.common.file_select'|trans }}</span>',
+                styleItemPanelAspectRatio: 0.5625,
                 // 保存されている画像のロード
                 files: [
                     {% for image in form.images %}