Hello, @bagshaw50,
Please copy and paste the below-given CSS code to XStore >> Theme Settings >> Theme Custom CSS and under Global Custom CSS if you want to apply it on all the versions of the site like Desktop, Mobile, or Tablet.
And if you want to apply it only on Mobile then paste it under Mobile Custom CSS.
You can change the Font Size in the below given code as per your requirements.
ul.st-swatch-size-normal li.type-label span {
font-size: 30px !important;
}
Regards 8Themes Team.