I have some of these models. I love them. There is a great variety and they have heaps of character. Each halfling is different and there are hundreds to choose from, including a vampire and some female models too.
They are 28mm but some are slightly smaller than others, as you would expect in life. You get tall , short , thin and fat people in real life and this has been captured in thebattleforge dwarf and halfling models.
I think they are very reasonably priced too.