Hello,
Thanks for the reply.
Now I can see, it is not from custom code.
To change the font-size add the next code:
@media only screen and (max-width: 992px){
li.product h2 {
font-size: 1.1rem;
}
li.product-category h2, li.product .product-taxonomies, li.product .star-rating, li.product .price {
font-size: 1rem;
}
}
Regards