Could anyone recommend a very small cross body bag I only need it for when I walk my dog as I'm sick of having thing stuffed in my pocket.it only needs to fit my keys and phone in and most iv seen are just a bit to big and I'm only 5ft 1 which doesn't help,I thought I had cracked it when I saw the russell and bromley zip code bag on line but now it's arrived it's too big which is a shame as it's a lovely bag :-(