Small wire heart, this simple project is a good introduction to crocheting with wire.
Pattern has written instructions and a diagram

Red wire 0.60mm
4mm (size 7) hook

(or a yarn of your own choice & with appropriate size hook if you do not like wire)

Depending on the your tension approx 1 1/4 inches (3cm)

Not required

http://www.nezumiworld.com/crochet_002.htm