The metal parts (the fittings and hooks) are stainless steel - they are not coated. Stainless steel does not cause nickel sensitivity or allergy.
The print is on both sides of the earring.
The earrings come with small silicone stoppers for the hooks.
Dimensions without the hook
Height of the Hen: 42 mm
Width of the Hen: 39 mm
Height of the Rooster: 54 mm
Width of the Rooster: 35 mm
Height of the Chick: 25 mm
Width of the Chick: 30 mm
Diameter of the hoop: 25 mm
Avoid exposing your earrings to water and chemicals (such as hairspray, etc.).