When should I start wearing bras and what to wear? Growing up is a time full of wonders and changes. During adolescence, a girl experiences a lot of physical and psychological changes. With secondary traits kicking in due to hormones, reformations like the development of breasts take place. Due to enlargement of the bust, there arises an obvious need to wear bras. However, without proper guidance, purchasing the right teenager bra or beginners bra can be a confusing task. Here are a few things to keep in mind while buying your first teenager bra or a beginner’s bra. The Right Time to Buy a Teenager Bra Each girl’s body grows in a different pattern than the other. Some girls start “growing up” at an early age of 8 or 9, while the others at 13-14. The appearance of an elevation under the nipple area typically indicates that the time to buy a beginner’s bra has arrived. A beginner’s bra provides the proper support needed for the growing body. At the same time, it gives the girl a lovely outlook.