After hearing our daughter talk about how comfortable her flip flops from Old Navy were for years, I decided to try them myself. Normally I do not like the thong style shoe, most times they rub in between my toes and I never wear them again.
Now if you consider the price, you have to be thinking what I was, "two pair for $5.00 cannot be good quality!" I bought some during our trip to Chicago and that is all I wore the entire trip, I was and still am surprised at the comfort.
They come in a huge selection of colors, I stuck with the white ones and the black ones, but they carry prints and solids in every color from pink, green, yellow, orange and more.
The heel is not more than half an inch, just enough to give you comfort and spring in your step but not give you added height and at 5'11" you do not want added height.
Give these a try, I think you will be pleasantly surprised like I was.