these are so significantly different that original Birkenstocks that they have no business being grouped with the originals. The buttons are a bit too small and too close together, and the 2 in the front are hard to reach without stopping or moving your hand awkwardly on the mouse. Le 20/21 le tengo per quando cresce. I love them and for me they seem to be true to size which is a 9B. 5?s would have been fine too. I love flesh toned shoes as it makes your legs look longer. 2 yr old grandson loves these shoes he wears all the time. ? No traen comandos por voz. Also have room for all the accessories and then some. Had to make room inside vehicle for 2 bikes while traveling.