It matters. They don't want small. Simple as that.
However, we don't always get what we want in life, and so neither do chicks who want big dkks. Just like goes who want big tyts will settle for someone with small ones if everything else makes up for it, so do chicks. MOST chicks anyway. I suppose there are always gonna be some who refuse to compromise.
So if you are small, I would say you need to put in EXTRA effort in other areas to make up for it. If just for your own piece of mind if nothing else. And never ever let it show that your size is any concern to you. I had a friend -- not just "a friend", it's really another person -- who I picked up a LOT. Good build, good looking, popular guy. Trust me, he picked up a lot. I never saw his dkk, but I did hear from chicks that it was pretty small. I had a couple of the chicks he had after he'd been with them, and, as chicks talk, one of them goes to me once that her and her friend (both of whom had been with my friend) were talking about my friend and she goes "and we were laughing about how little his dkk is.... still a good fkk though, cos it doesn't really matter cos it's what you do with it that counts". I don't know if she just added the last bit for my benefit, 'cos she hadn't seen my dkk yet, and so maybe she just said that not to alarm me. But this guy, you'd never have guessed that he was insecure about anything. Really really strong frame. And as I said, he went through a lot babes. So it "matters", but then, i guess, it doesn't, too.