The proper icon of St Christopher is of the saint as a warrior, not the man fording a river with the Christ-child on his shoulder. The latter is an image from western origin, and has nothing to do with the life of St Christopher of Lycia, who was martyred in the third century. Unfortunately, iconographers have mistakenly appropriated western imagery and painted it in an "iconographic" style.
The other image to steer clear of is the one of St Christopher with a dog's head. I and others have spoken at length on this forum on why such an image is wrong from the Orthodox perspective.