Oval shape with under rim.

The putt uses the soft sprout putt found in Lunor's Harmony and M13 series.
This model has adjustable padding, and if the size matches, it can also be used as distance viewing glasses.
I think the reading design allows it to be used for both distance and near vision, which is a big attraction.

Size:

Width of front: 136.5mm
Height of the front: 38mm
Width of lens: 43mm
Height of lens: 37mm
Bridge width: 24mm
Temple length: 145mm
*Please allow for slight variations.