.batsu {
  display: block;
  position: absolute;
  top: 0px;
  left: 0px;
  width: 26px;
  height: 26px;
}
 
.batsu::before, .batsu::after { /* 共通設定 */
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 2px; /* 棒の幅（太さ） */
  height: 24px; /* 棒の高さ */
  background: gray;
}
 
.batsu::before {
  transform: translate(-50%,-50%) rotate(45deg);
}
 
.batsu::after {
  transform: translate(-50%,-50%) rotate(-45deg);
}