@ionic/core/dist/collection/components/thumbnail/thumbnail.css

Base components for Ionic

:host {
  /**
   * @prop --border-radius: Border radius of the thumbnail
   * @prop --size: Size of the thumbnail
   */
  --size: 48px;
  --border-radius: 0;
  border-radius: var(--border-radius);
  display: block;
  width: var(--size);
  height: var(--size);
}

::slotted(ion-img),
::slotted(img) {
  border-radius: var(--border-radius);
  width: 100%;
  height: 100%;
  object-fit: cover;
  overflow: hidden;
}