By default file import size is 128MB in XAMPP latest version, you need to increase?.
Step 1 : Open your phpMyAdmin on browser and click on "Import" Icon, can see the import file size is (Max 128MiB)
Probably need to make two changes in php.ini configure file.
Step 2 : Open your php.ini file from the XAMPP by any text editor (vim, vi, gedit and etc), file location is /opt/lampp/etc
Need to find and modify the configurations, post_max_size & upload_max_filesize.
Step 3 : Once you have modified in php.ini file restart your XAMPP and refresh that same page on browser.
Note : This chnages also acceptable in Windows and restart your XAMPP. and see the result as shown above