Changing default avatar size cropped/used by BuddyPress,

How to change BuddyPress Avatar Thumbnail size and Profile image:

1) create a bp-custom.php file in your wp-content/plugins directory.

2) add that codes
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if ( ! defined( 'BP_AVATAR_THUMB_WIDTH' ) )
    define( 'BP_AVATAR_THUMB_WIDTH', 80 ); //change this with your desired thumb width

if ( ! defined( 'BP_AVATAR_THUMB_HEIGHT' ) )
    define( 'BP_AVATAR_THUMB_HEIGHT', 80 ); //change this with your desired thumb height

if ( ! defined( 'BP_AVATAR_FULL_WIDTH' ) )
    define( 'BP_AVATAR_FULL_WIDTH', 310 ); //change this with your desired full size,weel I changed it to 260 :)

if ( ! defined( 'BP_AVATAR_FULL_HEIGHT' ) )
    define( 'BP_AVATAR_FULL_HEIGHT', 310 ); //change this to default height for full avatar

?>

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Thank You.