Beats pro headband problem

Hey guys,

So I’m kind of new to toms, but i was wondering if you guys could help me with a problem with my beats by Dre Pro's. I got them from eBay (they are 100% genuine) for Christmas last year.

I got Beats Pro they came with a bag to put them in so I adjusted them to the smallest size so they’d fit inside. At the time I didn’t realise that I was putting pressure and strain on the head band. Now every time I use them, they slide down my head. The sound quality is fine it’s just they’re really loose.

I know now that I have to extend the headphones as far out as the will go before putting them in the bag. Could you give me any advice on how i might be able to fix them? Thanks.