border-radius:
100px;
border-radius:
100px 100px 50px 50px;

border-top-left-radius:
50px;

border-top-right-radius:
100px;

border-bottom-left-radius:
150px;

border-bottom-right-radius:
200px;

border-top-left-radius:
200px 100px;

border-top-right-radius:
200px 100px;

border-bottom-left-radius:
100px 200px;

border-bottom-right-radius:
100px 200px;