border-radius: 50%
border-radius: 15% 50% 15% 50% / 15% 50% 15% 50%
border-radius: 65% 35% 82% 18% / 80% 58% 42% 20%;
border-radius: 13% 87% 64% 36% / 12% 47% 53% 88%;
border-radius: 66% 34% 29% 71% / 33% 66% 34% 67%;
border-radius: 50% 50% 10% 10% / 75% 75% 10% 10%;
border-radius: 10% 10% 50% 50% / 10% 10% 75% 75%;
border-radius: 50% 50% 50% 50% / 30% 30% 60% 60%;