<div></div>

body {
  display: grid;
  place-items: center;
  height: 100vh;
  background: #333;
}

div {
  width: 200px;
  height: 300px;
  position:relative;
  
}

div::before, div::after {
  content: "";
  height: 100%;
  width: 90%;
  background: #DA0037;
  position: absolute;
  border-radius: 200px 200px 0 0;
}
div::before{
  left: -50px;
  transform: rotate(-45deg);
}
div::after {
  left: 35px;
  transform: rotate(45deg);
}