a business card that is 9cm in height and 5cm in width
a business card that is 9 by 5 centimeters
「縦９cm、横５cmの名刺」は
ーa business card that is 9cm in height and 5cm in width
ーa business card that is 9 by 5 centimeters
のように言えます。
例：
I just got some beautiful new business cards that are 9 by 5 centimeters.
「縦９cm、横５cmの綺麗な新しい名刺を購入した」
ご参考まで！
カナダ 
