how to make my ion-select as long as the amount of values ionic angular code example

Example 1: ion-select cancel text

<ion-select cancel-text="Cancelar">
	<ion-select-option *ngFor="let country of countries" value="{{ country.name }}">
		{{ country.name }}
	</ion-select-option>
</ion-select>

Example 2: ion select

<ion-select >
          <ion-select-option *ngFor="let country of countries" value="{{ country.name }}">
            {{ country.name }}
          </ion-select-option>
     </ion-select>