Chaco Men's Z/1 Classic Outdoor Sandals - Lightweight & Supportive Adventure Sandals for Hiking, Travel, and Water Activities

I've owned several brands of sandals but these are the most comfortable. I found some confusion about how to measure for size. What I did is stand on a ruler with the ruler and your heel against the wall. Go by whichever foot measures the longest. For a man if you measure 9 to 9-15/16 inches get size 9. Again for a man if you measure 10 to 10-15/16 inches get size 10. My longest foot measured 10-1/4 inches so got a size 10 and they fit wonderfully. Sorry don't know about women's sizes. Will take a few times adjusting straps to find best fit. Just be sure your foot is forward in the sandal as the back strap is slightly adjustable. This is how I got the best fit for me.