Check it out...

At the Autozone, there will be a little book in the aisle. All she has to do is look up your car, and match the part # to the plug on the shelf. It wont matter the size of the head, it will be the same as whatever I have. The part # in the book is the right part. It will say:

ACURA INTEGRA 94-01.....Magnetic.... Standard (and a few others)
.................................... xxxx ....... xxxxx
With you on the phone, the task shouldnt be too difficult