The outside dimensions of a 200-litre drum are typically 23 inches (584 mm) diameter at the top or bottom rim, 23.5 inches (597 mm) diameter at the chines (ridges around drum), and 34.5 inches (876 mm) height. Exact dimensions are specified in ANSI MH2.
The menstrual cycle is from Day 1 of bleeding to Day 1 of the next time of bleeding. Although the average cycle is 28 days, it is normal to have a cycle that is shorter or longer. Girls usually start having menstrual periods between the ages of 11 and 14. Women usually start to have fewer periods between ages 39 and 51. Women in their 40s and teens may have cycles that are longer or change a lot.
You should get your period once every month. Your menstrual cycle should be about 28 days. This means that there should be about 28 days from the first day of your period to the first day of your next period. 28 days is an average number, but anywhere between 21 and 35 days is normal.