Most frames have lens size details marked on the arms. If these markings are still visible, you can use them to select the correct lenses. If the markings have worn off, you can easily measure your lenses with a ruler.
Most frames have lens size details marked on the arms. If these markings are still visible, you can use them to select the correct lenses. If the markings have worn off, you can easily measure your lenses with a ruler.