Hello,
.products-grid .product .product-name {
font-size: 20px;
font-weight: 600;
}
.products-grid .product .price {
font-size: 20px;
font-weight: 900;
}
.single-product h2.product-name {
font-size: 20px;
font-weight: 800;
}
.single-product-page .product-info .price {
font-size: 20px;
font-weight: 600;
}
Regards