data grid view column size reduce

private void GridSizeAdjust()
        {
            dataGridView1.Columns[1].Width = 30;
            dataGridView1.Columns[2].Width = 130;
            dataGridView1.Columns[3].Visible = false;
            dataGridView1.Columns[4].Width = 100;
            dataGridView1.Columns[5].Width = 60;
            dataGridView1.Columns[6].Width = 60;
            dataGridView1.Columns[7].Width = 60;
            dataGridView1.Columns[8].Width = 60;
            dataGridView1.Columns[9].Width = 60;
            dataGridView1.Columns[10].Width = 60;
            dataGridView1.Columns[11].Width = 60;
            dataGridView1.Columns[12].Width = 60;
            dataGridView1.Columns[13].Width = 70;
            dataGridView1.Columns[14].Width = 60;
        }