Hesder service usually lasts a total of five years, within which participants are officially soldiers in the IDF. Through those five years, 16 months are dedicated to actual army service, comprising both training and active duty. In some Hesder Yeshivas, service lasts six years, of which 24 months are dedicated to actual army service. Almost all Hesder Yeshiva students serve in the army as combat soldiers. The remainder of the time in Hesder is designated for full-time Torah study. Some students study for several years after this mandatory term. "Yeshivot Hesder" typically have 150-300 students; some of the larger yeshivot have up to 500 students, while some have fewer than 100 students.