Hello,
Please try using the below Custom CSS code and paste it to Dashboard >> Theme Settings >> Custom CSS >> Global CSS section:
[class*="wd-swatches"] {
--wd-swatch-size: 45px !important;
}
You can change the value of size here according to your choice.
Further, the options or solutions which are possible through the Theme Settings or available Theme related options or either through some Custom CSS, we always try to provide wherever possible but for some of the options, the solutions aren’t possible through the Theme Settings or available Theme Options. So, for those it eventually requires Customization which is certainly out of our limitations and Support policy scope. Hope you can understand !
Best Regards