.aspect {
  display: block;
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 100%;
}

.aspect-16x9 {
  padding-bottom: 56.25%;
}

.aspect-inner {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

.my-img {
  width: 100%;
}