Physics. Invisibility is hard to achieve. A nice form fitting holster doesn't conceal the butt. I'm thin but stuffing your bra is just creepy. Fanny packs aren't in style anymore but maybe a purse. In a moments notice I just put the pistol in my jeans pocket and stay pointed "upstream". But that's not everyday carry. Get a smaller pistol. One of those weird barbers large shirts might be the answer. I never have considered an ankle holster unless I was tied up in a warehouse. "Excuse me, I need to scratch my foot".
If I should die before I wake...great,a little more sleep.