Barb:  I usually have a problem with slide-type sandals staying on my narrow and bony feet.  Sandals with straps around the ankle usually are the best.  These Softwalk Lago sandals are different because they have a ridge around the heel that helps keep the foot in place, and the adjustable strap over the top of the foot is high enough to keep the foot in the shoe.  There is still space between the front band and the top of my foot but it is not a problem.  The sandals are very attractive, and so very comfortable!  I feel like I'm walking on a cloud.