HTML/CSS

<img width="320" height="180" data-src="https://blog.f-arts.work/wp-content/uploads/2018/08/htmlcss-320x180.png" class="entry-card-thumb-image card-thumb-image wp-post-image lozad lozad-img" alt="" data-srcset="https://blog.f-arts.work/wp-content/uploads/2018/08/htmlcss-320x180.png 320w, https://blog.f-arts.work/wp-content/uploads/2018/08/htmlcss-120x68.png 120w, https://blog.f-arts.work/wp-content/uploads/2018/08/htmlcss-160x90.png 160w" sizes="(max-width: 320px) 100vw, 320px"/><noscript><img width="320" height="180" data-src="https://blog.f-arts.work/wp-content/uploads/2018/08/htmlcss-320x180.png" class="entry-card-thumb-image card-thumb-image wp-post-image lozad lozad-img" alt="" data-srcset="https://blog.f-arts.work/wp-content/uploads/2018/08/htmlcss-320x180.png 320w, https://blog.f-arts.work/wp-content/uploads/2018/08/htmlcss-120x68.png 120w, https://blog.f-arts.work/wp-content/uploads/2018/08/htmlcss-160x90.png 160w" sizes="(max-width: 320px) 100vw, 320px"/><noscript><img width="320" height="180" src="https://blog.f-arts.work/wp-content/uploads/2018/08/htmlcss-320x180.png" class="entry-card-thumb-image card-thumb-image wp-post-image" alt="" srcset="https://blog.f-arts.work/wp-content/uploads/2018/08/htmlcss-320x180.png 320w, https://blog.f-arts.work/wp-content/uploads/2018/08/htmlcss-120x68.png 120w, https://blog.f-arts.work/wp-content/uploads/2018/08/htmlcss-160x90.png 160w" sizes="(max-width: 320px) 100vw, 320px"/>

画像をいい感じの正円にする方法

画像をいい感じの円にしたい時（サムネやアイコン等）ってありますよね。簡単に設定するやり方をお教えします。円にするため...