What grade ptosis do I have? (Photo)

It appears you have grade II possibly III. The technique I recommend is The Bellesoma Method. This will reduce and reshape your breast tissue creating upper pole fullness without implants, elevate them higher on the chest wall and more medial to increase your cleavage. The weight of the breast is transferred to the underlying pectoralis major muscle resulting in pain relief without excessive reduction. Vertical scars are avoided, nipple sensation (in 95%) and the ability to breast feed are maintained.

Best Wishes,

Gary Horndeski, M.D.

I estimate your ptosis as grade II, bordering on III. Management of grade II/III ptosis will require true mastopexy (breast lift) and there are many options for type of lift. The other option, if this fits your desire, is breast reduction which involves elevating the nipple as part of the surgery.
I hope this helps.