Hello, Gourav,
Thank you for contacting us and for using XStore.
XStore Builders > Single Product via Elementor https://www.8theme.com/documentation/xstore/xstore-builders/xstore-single-product-builder-with-elementor/ > edit template > Product images > select Type of gallery.
Please read this article first – https://www.8theme.com/documentation/xstore/woocommerce/product-images/
It is recommended to use a graphics editor and prepare product images (make them the same size) before uploading images to your media gallery and for products. In other cases, images may have different heights on the frontend, and the Crop option can be useful in this case.
We hope this information is helpful.
Warm Regards,
The 8Theme Team