Function: Ovaries are the primary reproductive organ producing egg cells and hormones (progesterone and estrogen) in females. Shape: It is a solid, ovoid structure with the shape of an almond. Size: 3.5 cm in length, 2 cm wide, and 1 cm thick [approximately]

Structure:
Covered on the outside by the germinal (ovarian) epithelium, a layer of simple cuboidal epithelium, which later transforms to squamous epithelium. The next layer is tunica albuginea, a dense connective tissue capsule.
Ovaries have two distinct parts: cortex and medulla. The cortex contains ovarian follicles at various stages of development, while the ovarian medulla has arteries and veins, lymphatics, and nerves.

Sources: https://training.seer.cancer.gov/anatomy/reproductive/female/ovaries.html
https://uta.pressbooks.pub/histology/chapter/reproductive-system/

You can check out these sites and also read about the development of the ovarian follicle. Have fun!