Some styles fit differently than others. For example, the Gizeh, Madrid, and Yao tend to fit just a tad larger than the other styles. Consider going down a size or getting a Narrow/Medium width if available.
The Egyptian inspired Gizeh is not only classical, but highly functional. The toe post reduces movement from side to side and the well-placed instep strap helps to keep the sandal in place with little effort. .
Birko-Flor nubuck is made of easy-to-care-for and hygienic PVC, which has been lined on the inside with a soft, breathable layer of felted nylon. The surface looks like natural leather. This high-quality material is very gentle on the skin and comfortable.