.ol-input-popup.ol-size li {
  display: table-cell;
  height: 100%;
  padding: 5px;
  vertical-align: middle;
}

.ol-input-popup.ol-size li > * {
  background-color: #369;
  border-radius: 50%;
  vertical-align: middle;
  width: 1em;
  height: 1em;
}

.ol-input-popup.ol-size li > .ol-option-0 {
  position: relative;
  width: 1em;
  height: 1em;
  border: 2px solid currentColor;
  color: #aaa;
  background-color: transparent;
  box-sizing: border-box;
}
.ol-input-popup.ol-size li > *:before {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.ol-input-popup.ol-size li > .ol-option-0:before {
  content: "";
  width: 1em;
  height: 2px;
  background-color: #aaa;
  transform: translate(-50%, -50%) rotate(-45deg);
}