For small boobs like A or B cup.
Most Helpful Guy
Depends on the cloths but for A and maybe B cup breasts I would choose no bra. A push up bra doesn't make that much of a difference and possibly doesn't have any necessity.1
Most Helpful Girl
Depends on the situation. I have lovely perky boobs. When I 'm going to a party I like going braless. The image through the clothes drives boys crazy. When just going out normally I like a push-up bra. Gives more cleveage.1