I have a few pair of mittens to barter :) 4 of them are baby (with no thumb). The big blue pair is obviously an adult size (wool blend outer with fleece lining), the brown/gray with gray cuffs is toddler size, and the R/L ones are a size that just fit my 8 year old :)
They're felted wool with fleece lining -- they can go into the washer and dryer as well! :)
What are you looking to get for your mittens? I'd be interested in the R/L ones for sure, maybe one of the little blue pair too. I have an almost 2 year old girl and a 4 year old (but sized more along the lines of a 6-7 year old) boy that could both use mittens.
~"Be yourself; everyone else is already taken." — Oscar Wilde~