Do guys prefer big or small boobs?

My bf (14M) says that he likes my (14F) boobs even tho there small when ever I ask him but he's always saving images with anime girls with big boobs and I asked him what his dream girls body looked like and he sent me a picture with fan art and she had big boobs, a skinny stomach and a hourglass figure (I have non of those) so what do you guys prefer a girl to look like? (Be honest please)