I can't set the size of one of the slides, I would like to make the width of the second slide smaller, but I can't

Ionic Framework ionic-v3
#1 
<ion-slides pager="false">
    <ion-slide>
      <img src="../assets/slides/foto1.jpg"> 
    </ion-slide>
    <ion-slide >
      <h3>Informações:</h3>
      <p>E-mail: teste@gmail.com</p>
    </ion-slide>
  </ion-slides>