diff --git a/lib/ui/teacher_student_management_page.dart b/lib/ui/teacher_student_management_page.dart
index 64c2add..a89a9a2 100644
--- a/lib/ui/teacher_student_management_page.dart
+++ b/lib/ui/teacher_student_management_page.dart
@@ -673,7 +673,9 @@ class _TeacherStudentManagementPageState
                 // 📐 학생 목록 타일은 "실시간 출석 확인" 목록의 타일(220x148)과 동일하게 맞춘다.
                 final bool isWide = constraints.maxWidth >= 800;
                 final double listWidth = constraints.maxWidth;
-                final double squareSize = (constraints.maxWidth - 20) / 2;
+                // 📉 계정 추가 / 엑셀 등록 칸: 정사각형 기본 크기의 25%로 축소.
+                final double formSquareSize =
+                    ((constraints.maxWidth - 20) / 2) * 0.25;
 
                 final Widget addBoxColumn = Column(
                   crossAxisAlignment: CrossAxisAlignment.start,
@@ -681,8 +683,8 @@ class _TeacherStudentManagementPageState
                     _sectionTitle('신규 학생 계정 추가'),
                     const SizedBox(height: 16),
                     SizedBox(
-                      width: isWide ? squareSize : double.infinity,
-                      height: isWide ? squareSize : null,
+                      width: isWide ? formSquareSize : double.infinity,
+                      height: isWide ? formSquareSize : null,
                       child: _buildAddAccountBox(),
                     ),
                   ],
@@ -694,8 +696,8 @@ class _TeacherStudentManagementPageState
                     _sectionTitle('엑셀로 한번에 추가 (신입생 등)'),
                     const SizedBox(height: 16),
                     SizedBox(
-                      width: isWide ? squareSize : double.infinity,
-                      height: isWide ? squareSize : 240,
+                      width: isWide ? formSquareSize : double.infinity,
+                      height: isWide ? formSquareSize : 240,
                       child: _buildExcelBox(),
                     ),
                   ],