JSFiddle - React, Tailwind, and code Playground

HTML

<div class="page">
  <div class="button-with-lines">
    <div class="button">X</div>
  </div>
  <div class="button-with-lines">
    <div class="button">X</div>
  </div>
</div>

CSS

.page { /* decorative styles, emulating some page with background */
  width: 100vw;
  height: 100vh;
  background: red;
  padding: 150px;
}

:root {
--lineHeight: 75px;  
}


.button {
  background: white;
  width: calc(100% - 20px);
  height: calc(100% - 20px);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.button-with-lines {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 1px solid white;
  margin-top: var(--lineHeight);
  margin-bottom: var(--lineHeight);
}

.button-with-lines:before, .button-with-lines:after {
  content: "";
  display: block;
  width: 1px;
  height: var(--lineHeight);
  background: white;
  position: absolute;
  left: calc(50% - 1px);
}

.button-with-lines::after {
   top: calc(-1 * var(--lineHeight)); 
}

.button-with-lines::before {
  bottom: calc(-1 * var(--lineHeight));
}