Framing size is typically noted on the inside of the temple. For example:
Eye size is the width of the lenses at the widest part.
Bridge size measures the part that connects the lenses.
Temple size is the measurement of the arms of the sunglasses starting at the hinges and continues in a straight line to the farthest point without sloping downwards.
If you are still unsure, we have indicated what face shapes suits each of our styles under each style's product description.