Hello,

01. You can find the sizes used on the demo here: https://xtemos.com/docs/woodmart/faq-guides/image-size-content-alignment-product-grid/

Also, you can define the “height” of the shop thumbnails by setting up the width:height aspect ratio in the “Thumbnail cropping” section:

Custom: In Custom you can select the aspect ratio of the image. Here are some of the popular aspect ratios (1:1, 5:4, 4:3, 3:2, 16:9 and 3:1).

Uncropped: Height of the image will be untouched. Images will display using the aspect ratio in which they were uploaded.
https://ibb.co/6mR6DbD

02. Mobile bottom navbar is fine on your site: https://ibb.co/xsNP17G. Sometimes, outdated or cached files can cause display issues. Check back your site after completely clearing the browser cache.

Best Regards.