size 37 (equivalent to US size 6. 5-7...see last photo for size chart) Pikolinos Puerto Vallarta Ocean leather sandals.

from their website:

The Pikolinos Puerto Vallarta is a casual women's leather wedge heel backstrap sandal with an adjustable hook and loop ankle strap.

These Pikolinos Puerto Vallarta Ocean Leather Women's Sandals have the following features:

Upper: calfskin leather
Hand-sewn stitching, offering greater flexibility
Inner lining: pig skin leather
Sole: synthetic
Adjustable velcro strap

in good pre-owned condition

This item is sold from an excellent, highly rated vintage boutique in Denver, Co.