how to make image smaller in css code example

Example 1: make an image smaller css

css:
.example-class {
    width: 400px;
    height: auto;
}

html:
<img class="example-class" src="example.jpg"/>

Example 2: Scaling Images and Videos css

.container {
  width: 50%;
  height: 200px;
  overflow: hidden;
}

.container img {
  max-width: 100%;
  height: auto;
  display: block;
}

Example 3: scale down image css

img.resize {
    width: 540px; /* you can use % */
    height: auto;
}