How to assign size of column in a mysql with laravel 7

So I'm learning laravel and now I'm in the migration part, I have faced a problem whenver i try to assign a size to an increments it doesn't it always shows me that the size is 10 why?

Here an example when i assign a size to a string:

$table->string('notificationMessage', 250);

it works perfectly, but when i assign a size to integer it always shows me 10:

$table->increments('id', 250); 

what can i do to fix that?

via Chebli Mohamed