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.
Height of the earring without the fitting and hook: 63 mm
Width: 39 mm
Avoid exposing your earrings to water and chemicals (such as hairspray, etc.).