How to match a face shape with a reading gasses frame is really very important, for a women, suitable eyeglass frames will make you look more beautiful.
The overall eyeglass frame width should be close to your overall face width.
For round shape face, a face that is round has curved outline with the overall length and width proportions being approximately equal. A pair of reading glasses that are angular and narrow will lengthen and help to make a round face appear thinner. Rectangular reading glasses usually go very well on round faces.
For heart shape face, a heart shaped face is wider up top and narrows towards the chin. You should look for such reading glasses frames that are wider at the bottom than at the top. Lighter reading glasses frames and rimless designs go very well with heart shaped faces.