This Crochet Pattern includes instructions for making Knight Helmet, Diaper Cover, Chainmail vest and written for the 4 sizes from Newborn to 12 months

Check also my  Sword and shield CROCHET PATTERN and Knight Helmet Crochet Pattern to make great set to photo prop:
Knight Helmet with Moveable Visor/Face Mask to keep your face warm (7 sizes - Newborn to Adult)