is there any way for these icons to fit the profile area properly
you can stretch them. if you need more resolution you could even modify the plugin, as it is generated.
edit - looks like they have only three sizes.
Why not add a border/margin and centre them?
grep is your friend.
@remzi Go to domain/conf/config-defaults.php file
You can find a code line like this (line #85) $Configuration['Garden']['Profile']['MaxWidth'] = 250;
$Configuration['Garden']['Profile']['MaxWidth'] = 250;
Change 250 to your size
Changes should not be made to the config-defaults file
The code should be copied to config.php and changed there.