I have many pairs of Havaianas, all type of colors and patterns. These flip-flops are very durable, I have had many for several years and they are still perfect. I have not had any problems with the sizing system I wear the same size as I do in other European-sized shoes. I have never seen flip-flops with such a range of colors, styles and patterns, These are really unique and people will really notice you when you are wearing them. I recommend these highly as an inexpensive way to really add color and excitement to your summer wardrobe.