What is the size limit for sending a registered mail?

The size limit for sending a registered mail through Hongkong Post is determined by the maximum dimensions and weight allowed. For domestic mail, the package should not exceed a length of 1.5 meters or a combined length and girth of 3 meters. The weight limit is set at 30 kilograms. When sending overseas, the length should not exceed 1.05 meters, and the combined length and girth must not exceed 2 meters. The weight limit for international registered mail varies depending on the destination country, ranging from 2kg to 20kg. These size restrictions ensure safe and efficient delivery of registered mail, while adhering to international postal standards.