Really big font on Category and product names after the update

Try:

.single-product .product .summary h1.product_title {
    font-size: 1.618em;
}

It also looks like you need to add support for version 3’s new gallery functionality. See this thread:

https://www.ads-software.com/support/topic/3-0-missing-gallery-functionality/

Yes all font issues fixed now ?? yay!

Unfortunately, the layout on the single product pages is still off. Either the product thumbnails are too large or the text (product title, etc needs to shift right). I thought the change in text size would fix it but it hasn’t.

e.g. https://www.rajasthantreasures.com/product/cow-shaped-wooden-stool

Help again please

To fix the product gallery I added code in functions.php according to
https://createandcode.com/broken-photo-gallery-and-lightbox-after-woocommerce-3-0-upgrade/

However, Wootique does not support the new gallery yet and the layout was still wrong. The suggested update code on above website also didn’t work.

I added the WooCommerce Product Gallery Slider plugin and that helped to some extent. However, the thumbnails now only show half the thumbnails.
e.g. https://www.rajasthantreasures.com/product/solid-bamboo-ladder

Is that a plugin issue or something else?