Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not a standard size

I bought this adapter thinking it was a good rated product that would work well with my MacBook Pro!!! to my surprise, this turned out to be a poor quality jack that is not to the standard 3.5 measurement. it does not work unless you push the jack firmly with your hand and place a little wight on top to keep it in place. this is completely unacceptable. i tried to shave off a little from the head of the adapter to allow for one more millimeter of length but in vain there is no click that you get from the regular headphones jack.