^ tomato8 - If you are talking about Lanvin's ballet flats, then no the elastic does not stretch out with time. If its killer when you buy them it'll remain killer for the long haul. As with all shoes, the fit really depends on the shape and not only on the size of your foot. I always take a size 36 in Lanvin elasticated ballet flats, however, I do try them on with care before I buy as there can be small variations in size, tightness of the elastic, etc. which is most often due to the material used on the upper. For example, I love the patents because I find these have the tightest elastic, then afterwards the lizard flats, the regular leather still fit but have more give around the elastic. However, I did buy a pair of the metallic flats from last Summer and found that they were too big. BTW, although I choose the shoes on the snug side - they are snug around the elastic part - I can always move my toes inside. Don't squish your toes - you'll get foot problems down the line! lol..