There are different types of families in our societies. For example, joint families, small families, medium families and couples. 
Joint families - these are the families in which about 7 people live. Sometimes two families live together. That is also known as a joint family. 
Small families -  small families are families consisting of only 3 - 4 members. 
Medium families - medium families are families where even the children grandparents may also live. This family consists on average about 6 members. 
Couples - couples are newly married people. they are also found in the society these days.