Size standard of hotel star brand

3x12mm。 The size standard of hotel star brand is measured by professional designers for many times, and the final size standard is 3 x 12 mm. Hotels (also known as hotels, hotels, inns, hostels, business trips, inns, hotels in China, and hotels in Malaysia and Singapore) are basically defined as commercial organizations that provide safe and comfortable space for users to rest or sleep for a short time.