Glad to help- they are small, about 1.5 inches wide, 2 inches tall and maybe about 3/4 inches thick but hold enough of the sanitizer to last for your outing (1/2 oz) and are refillable. They come in different colors and attach easily to the strap of your purse, a belt loop, back pack or what ever-and the ones I got came in a pack of 2... at the checkout. Hope they have them where you are.
If you don't see one, ask a clerk. They are made by Purell.
They have all sorts of the little wipettes but the thing about those is you have to get into your purse or whatever to get to them, spreading the germs to your personal items. Nice thing about these little dispensers is they are outside and easily accessible for when you need them. A little squeeze gives you all you need for a good handwashing. Glad I described or you'd never have spoted the little mini bottle- if I don't know what I'm looking for, I look right past it sometimes.
Here's a link to what they look like- http://www.discountsafetygear.com/hand-sanitizer-purell-2go-0-5oz.html
I got mine a few years ago and they apparently have changed the design of the holder a little to just grab the top of the little bottle. My holder is like a little sleeve from the top to the bottom along the sides, leaving the front/back open to show the advertising :) You can see the little loop coming off of the holder- that is what I use to attach it to things but it can also be used to hold your keys I suppose, if you are going out without a purse. I've used it quite some time and never have had any issue with it.