These mittens were made using the same pattern that I posted before. These are smaller versions made to fit a child's hand. I simply used one strand of yarn rather than two. The hook size remained the same.
After working the beginning of the thumb, I went more rows on the mitten on the right of your screen. That is why you see the two sizes are not the same.
The width is approx. 6 1/2 inches for a child.