Here's a quick explainer on how frame sizing works.
Numbers below are only examples. See "Frame Size" for the actual measurements of this frame.
Lens width 47 19 - 140
This is the horizontal width of each lens at it widest point. It typically ranges from 40mm to 60mm.
Bridge width 47 19 - 140
This is the distance between your two lenses. In short, the bridge width is the space where you frames fit against your nose. The size of this piece ranges from 14mm to 24mm.
Temple (arm) length 47 19 - 140
This is the length of the temple from each screw to its temple tip, including the bend that sits on your ear. The temple is typically 120mm to 150mm long.