[data-gf-size-chart]:empty {
  display: none;
}

[data-gf-size-chart]:not(:empty) {
  margin: 12px 0;
}

.woocommerce div.product [data-gf-size-chart] > a.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  float: none;
  box-sizing: border-box;
  min-height: 50px;
  max-width: 100%;
  padding: 12px 16px;
  line-height: 1.4;
}