What unit do you mean by 45*30? I measured (the oval cover on the paper). The longest is about 39 mm (3.9 cm) and the widest is about 26 mm Sometimes the boss is often not in the company, even in other places, and some companies will have the boss's signature and seal. There are no formal or formal provisions in the Hong Kong Company Charter. But the company's seal has the boss's signature, which is almost certain-there is no such thing.