In Chapter 14, Bruno is visiting Shmuel and they are talking about the two sides of the fence. Bruno wants to come over to the other side, but Shmuel tells him he doesn't think it is a good idea. Shmuel tells Bruno that he doesn't understand his desire to see his side of the fence because it isn't very nice. Bruno, having been raised privileged, does not understand. He thinks that only having three floors in his house is a disadvantage. One day Bruno asked if everyone on that side of the fence wore the same striped pajames and cloth caps. Shmuel tells him that they were given those clothes when they arrived and that their other clothes were taken from them. Bruno says that he doesn't even like stripes, but he is tired of wearing trousers and shirts and ties and shoes that were too tight for him. It doesn't seem fair to him that Shmuel and all of his friends "got to wear striped pajamas all day long." (pg 152) The page number is for my edition of the book. It may be a little different for you. However, it is in chapter 14.