Hello,
To change the size of social share buttons from the product page you can use the below css in Theme Setting >> CUSTOM CSS >> Global Custom CSS:
.product-image-summary-wrap .woodmart-social-icons.icons-size-small i {
font-size: 24px;
}
Result: https://jmp.sh/VMQQi91
There is no option in the theme to change the icons of social share. You just have to enable the social share link from the Theme Settings >> Social Profiles >> Share buttons. Icons will be used by the theme as default.
Best Regards.