The age at which Muslim girls start wearing the hijab varies and is not specified in the Quran. It depends on the familys culture and tradition, the girl, and the community. Generally, Muslim girls start to wear hijab at around puberty, with some practicing it at an earlier age. Some girls start wearing hijab when they are around 10 years old, while others start when they are 12 or 13 years old. In some societies, girls wear a white or black chador or hijab from the age of 7 to about 12, and when they are around 13-15 years old, its often time for a burka. However, there is no consensus on when exactly this should happen. In an Islamic country like Pakistan or Saudi Arabia, where there is no tradition of wearing veils for girls and boys at all ages, most mothers will want their daughters to cover up with headscarves when they get older. It is important to note that the hijab is worn by Muslim women as an act of modesty while in public, and it is expected of most Muslim females at the time of puberty.