210mm*285mm, there are 285mm*210mm. The sizes of drama souvenir albums are generally divided into two types: horizontal format and vertical format, as well as square format. The sizes are 210mm*285mm and 285mm*210mm. This is the most common size, and it is also the most commonly used among the commemorative book sizes of horizontal/vertical format. The size of the square drama souvenir album is generally 285*285.