It wud increase during pregnancy or lactation. Surgical option would be breast augmentation or silicone implants insertion.

Hi there i understand your concern and anxiety...naturally breast size increases during pregnancy and lactation...you can waite till that if no improvements even after that you can consult nearest plastic surgeon... The only way to increase breast size is by augmentation with breast implants which are placed behind the breast through an operation. You need to be comfortable with your breast size and whether you want to undergo an operation to insert the implants.