Try several models, sitting on the seat your feet should flatly touch the ground. Take a short spin around the parking lot, the bike should turn with little effort. Also try lifting the bike it should be light and easy to handle.
With out knowing your height and weight it would be hard to determine what size bike would be good for you. The best thing for you to do is to visit a bike shop where they have a specialist whom can work with you and help you to select the best bike for you.
I suggest you a bike with minimum of Length 4 ft,minimum of breadth 1. 5 ft,minimum of weight 190,minimum pounds height 3ft is a good size bike for you,according to me
A Small size road bike is only suits to me. Becaused, the small size bike not having that much of weight and it very easy convenient. This types of bikes can go at small roads and not required much parking area and it is easy to handle for womens like me.