I have small feet too (size 3) and hellish difficult to get something to fit. I LIVE in my wellies, both at work and in the garden. I got Hunters size 4 and only have to wear one pair of socks in them Shortie!

If you've got small feet don't go for anything with steel toe caps. I had to get them for work (Dr Ms with steel toe caps) and although they are a size 3, the steel toe cap is the same size as a size 11! I can hardly walk in the things as the toe cap comes half way up my foot.