: Upper bust 85, lower bust 70. After subtraction, it is 15cm, which belongs to the C cup. If the landlord's measurement is accurate, it should belong to sexy big chest in China, which is enviable. The cups corresponding to the difference between upper bust and lower bust are: aa7.5cm a10.0cm b12.5cm c15cm d65438+. 75, 80, 85 refers to the lower bust. Some underwear is marked with 34, 36, 38, etc. , is the inch of the upper bust, not the centimeter; 1 inch is about =2.5cm. For example, underwear of model 80A is equivalent to underwear of model 36A, because 80A refers to an upper bust of 90cm and a lower bust of 80cm, with a difference of 10cm, which is a cup; Inverse calculation, 36A refers to the upper bust of 90cm(36×2.5), with a difference of 10cm(A cup), so the lower bust is 80cm(90 minus10); Therefore, it can be determined that the landlord should wear 70C(38C or 38/70) underwear. Now some underwear models are not standardized, and the underwear industry is very chaotic. Because of the vanity of some women, they don't want to say that they are small breasts with A cups. In order to meet customer requirements, the manufacturer also marked the A cup as the B cup, and the B cup as the C cup. Therefore, underwear of the same standard from different manufacturers is actually different, so it must be small.