Almost every shop will stored small eyeglasses frames. You shall go an shop and ask their sellers or optician to choose the right size glasses frames.
Or if you plan to buy small glasses online, it will be more easy since you can search "small eyeglasses" easily. Getting the best looking eyeglasses frames, you can "Try on" their eyeglasses on Virtual Try on System with your photos. Hope this help you. And i often buy eyeglasses at firmoo.com where have small glasses frames.