Are my breasts tubular or just small?

Hello dear!
Thank you for your question and provided information as well..
Based on your photos, it seems that you have just small and symmetrical breasts for which you wish to add more volume. There are many ways that plastic surgeons perform measurements in order to determine which breast implant size, style and shape will best suit your goals. It is important that you communicate to your board-certified plastic surgeon what are expecting, to make certain that your goals are realistic. It's helpful to show pictures of results you'd like, but please keep in mind that these are other people and your body is different from everybody. In my office, we use a method of sizing with silicone gel forms of known volumes. This is proven to be a very accurate means of determining what size will might be of additional interest to you as well.
Know that the price depends on the size, profile, and shape of the implant is based on your desired breast size/shape, your chest wall measurements, and soft tissue quality.  This decision should be based on a detailed discussion with equal input from both you and your surgeon.   
Hope this helps and best of lucks.
Dr. Luis Mejia.

Your breast have minimal herniation of nipple but no evidence of tubular breasts. You will benefit from breast augmentation with silicone implants though fat transfer is an option. Implant will give better projection and satisfactory results. Fat transfer will involve multiple procedures and unlikely to give desired projection.