Hello, Giannis Lelekis,
In order to solve your problem, we have made adjustments to the line-height settings in Theme Options > Typography. Please clear your cache and add an item to your cart to check the results.
Additionally, you may want to try our built-in compare functionality, which can be found in Theme Options > WooCommerce > Built-in Compare. We recommend disabling any third-party compare plugin you may be using.
Best Regards,
8theme team