.avatar {
  display: inline-block;
  vertical-align: middle;
  overflow: hidden;
  width: 50px;
  height: 50px;
}
.avatar img {
  max-width: 100%;
  max-height: 100%;
  border-radius: 4px;
}
.avatar-empty {
  border: 1px dashed #d1d8dd;
  border-radius: 4px;
}
.avatar-small {
  margin-right: 5px;
  width: 24px;
  height: 24px;
}
.avatar-medium {
  margin-right: 5px;
  width: 36px;
  height: 36px;
}
.avatar-large {
  margin-right: 10px;
  width: 72px;
  height: 72px;
}
.avatar-xs {
  margin-right: 3px;
  margin-top: -2px;
  width: 17px;
  height: 17px;
  border: none;
  border-radius: 3px;
}
.avatar-text {
  display: inline;
  width: 100%;
  height: 0;
  padding-bottom: 100%;
}