not enough space in <mat-select>. How to add multiple line <mat-option>?

.mat-option {
  margin: 1rem 0;
  overflow: visible;
  line-height: initial;
  word-wrap: break-word;
  white-space: pre-wrap;
}
.mat-option i {
  display: block;
  font-size: 1.5rem;
  opacity: 0.6;
  margin-left: 0.5rem;

}

This was also helpful

Use following css :

    .mat-select-panel mat-option.mat-option {
      height: unset;
    }

   .mat-option-text.mat-option-text {
      white-space: normal;
    }

OR

/deep/ .mat-select-panel mat-option.mat-option {
  height: unset;
}

/deep/ .mat-option-text.mat-option-text {
  white-space: normal;
}

Sample demo is here - https://stackblitz.com/edit/angular-material2-issue-ndtstg