Valentine is a simple little amigurumi which can be whizzed up in no time. He measures approximately 2 inches high / 2.5 inches wide and uses a small amount of double knitting yarn and stuffing. You could use any thickness of yarn just reduce the size of the hook by at least 1mm (or 1.5mm for the heart) so the stitching is nice and tight.

Abbreviations throughout are US.