How bad is the sag of my breasts? (Photo)

Based on limited photos- it appears that you have pseudo-ptosis which can be treated with mastopexy/lift+ possible smaller implants ( if you desire volume increase). You can also have just Augmentation with implants but it will not lift the breasts like lift would do-and the breasts will continue to sag overtime. I suggest that you seek an experienced Board Certified PS

Thank you for the question and photos provided. It does appear that you have some tissue falling below the inframammary fold but your anatomy is still in good shape with nipple areolar complexes at nearly the maximally projecting point on the breast. If you are wanting more breast volume and added upper pole fullness, you could consider an implant alone to fill out your breast envelope and give you an appearance of a slightly higher, fuller breast.