The width is 23.5cm, the height is 16.5cm, and the standard two-inch ID photo is required for the photo. The size of the certificate of job-transfer training for primary and secondary schools in the National Open University is 23.5cm wide and 16.5cm high. The photo requires a standard two-inch ID photo. The National Open University is a world-class public adult university, which was founded in June 20 12. It is a national key university and a world-class institution of higher learning directly under the Ministry of Education of People's Republic of China (PRC). It is a new type of higher education supported by modern information technology, combining academic education with non-academic education, and implementing distance open education.