admin/src/scss/3-components/_avatar.scss

.avatar {
  width: 40px;
  height: 40px;
}

.avatar-lg {
  width: 64px;
  height: 64px;
}

.avatar-title {
  display: flex;
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: center;
  color: $primary;
}