For this design you can use 4ply sock yarn or any other 4ply yarn, so the mittens can be knitted for a boy or a girl. You can leave the cuff long to cover the arm, or fold it over. The mittens measure approx. 5inches (12.5cm) from fingertip to cuff. Please let me know your comments & take a look at my website for more creative stuff - www.adelsknitandcraft.wordpress.com