Exactly! I know it like the back of my hand.
Puzzled by some of these answers. Wake up one day and it’s My god whose hands are these? 
If I was shown a photo of a pair of hands and asked if they were mine or not, I’m sure I could tell.
If I was shown 50 or 100 photos and asked to pick mine out… then I’m not so sure. More likely than not, but not for certain.
Are we talking color or B&W photos? That might make a difference.
Yes, and in fact have identified a photo of my big toe that had been skimmed from a message board and used by someone on their website. It came up on a Google search and I thought, Hey, wait a minute!
I know my hands like the back of my hands!
I have a few distinctive scars and even without my wedding ring I have the mark of the ring, so unless I’m up against a bunch of people who are as clumsy with tools and as wedded as I am, I’d probably pick my hands out of a lineup. At least, by the backs of my hands. Palms and fingertips don’t seem to get as distinctively scarred.
I might be, depending on how I was holding my hands when the picture was taken, and the angle of the picture. I’m double-jointed in my fingers, and when I try to straighten my fingers out all the way, the first joint sort of pops out towards the palm side. But it’s not noticeable when my fingers are slightly curled inwards, and even when it’s happening, it might not be noticeable from the wrong angle.
I’d think the other way around. Given a lineup of 50 or 100 hands, I’d certainly be able to eliminate a lot of them right away: Those are all women’s hands, those have the wrong skin color, those ones do have distinctive scars, etc. And of the ones that were left, I might be able to pick out which one was mine. But if I didn’t know that my hand was definitely one of the ones in the lineup, I couldn’t be confident at all.
The back of my hands, yes. I have freckles on my left hand and a couple of distinct scars on my right. Palms, probably not.
I did once, a great many years ago. There was a picture of my hands on a typewriter in my high school yearbook. I knew it was my hands because I remembered a school photographer taking a picture, and because I have a small but distinctive scar on one knuckle.
Definitely my left hand, even with my wedding ring removed. My pinky finger is crooked from being broken a few times playing ball, and I have a ring tattoo with the first letter of my wife’s name on my ring finger.
Hand tatoos are cheating 
Maybe, but I ain’t gonna have it removed. If I turned it palm up, there’s a scar from where I was using a kitchen knife to separate two frozen burger patties and it slipped, stabbing my palm.
Yeah, I have pretty distinctive hands, my left from a rollover car accident and the right from a pair of minor burns.
And of course the lesser saints of this board, the Mythbusters, did this:
Adam and Jamie brought in 50 male and 50 female volunteers and took photos of the back of their right hands. 12 additional volunteers were blindfolded while their hands were photographed, then (while wearing gloves to prevent cheating) they were asked to identify their hand among a set of 9 other similar-looking hands. 11 out of 12 people identified their hand correctly, many of them very quickly.
I’d recognize the right hand — I have a Y shaped scar on the left area of the palm from putting my hand through a storm door when I was very young, plus my middle finger has trigger finger from an incident 15 years ago. Left hand is nothing special.
Between watching myself type, play piano (in years past) and crochet, I think there’s an excellent chance I could pick my hands out of a line-up. The only caveat is if my paternal Grandmother’s hands were also in it; I’d have a hard time telling which were hers and which were mine.
I could narrow it down to a few choices, but I’m not sure I could pick them out without a direct comparison. I don’t pay all that close attention to them.
In a line-up, I think I could recognize my hand. If I just came across a random picture somewhere with no context, probably not.
It depends on how many other stubby-fingered entries are in the line-up.
mmm
I can think of someone who would deny them.
I can recognize my right hand from the palm. I have a fairly distinctive, faint yet still visible semicircle of a scar from when I fell palm-first onto a broken bottle during a pre-school recess. Kinda shocking it’s still there really.
Otherwise, probably not taken in isolation. I have kinda small, delicate hands for a guy but I only think that would help with guessing in the 50 hand scenario and then only if there was a lot of contrasting hands.
Took me a second.
Yes. But with “no context”, no. My hands are just “normal”, like my accent. It’s the rest of you that have distinct hands and accents 
My finger tips are thicker than yours, but I’d have to do a comparison to pick that.. My hair distribution is different than yours, but I wouldn’t notice that without comparison. Also, I have faint scars from rock climbing, but I’d have to look for those.
I probably wold not be able to recognise my wrinkle patters, and certainly not my finger prints.