It should not be a complete shape of the animal.
The rulings related to jewellery and items that have verses of the Quran, names of Almighty God, and also names of Ma'sumeen (a.s.) is that the script must not be touched unless one has wudhu', and that it is not contaminated with any najasah.
If you have a ring, or a pendant, or something that has such script on it, and you know you cannot avoid touching it, or it touching your skin and you might not be on wudhu', then one thing you can do is cover it with a layer of colourless see-through nailpolish.
With the layer over the script, you will not have a problem if you are not in wudhu', and you touch it, or it touches your skin.
As for when you go to the toilet, you do not necessarily need to remove the jewellery, as long as you keep it away from najasah. If you think it might be contaminated with any najasah, then it is wajib to remove it.
And Allah knows best.
Muslim woman is not allowed to wear and show any jewelry in front of non Mahram men, including necklaces, bracelets, rings etc.
This is all going to be circumstantial, because a female could be wearing a ring, and it could be attracting the gaze of the non-mahram, and it could not.
The outer hijab of a woman is covering up herself, with the exemption of her face, and her hands up to her wrist. Everything else should be covered.
If she is wearing any jewellery, and that jewellery is on top of her hijab clothing, or on her hand, like a ring, then it could be either halal to show, or haram.
It would depend on whether the piece of jewellery is attracting the gaze of a non-mahram, or resulting in lustful looks, or solely considered as 'zeenah'. In this case it would be haram for her to reveal.
If a woman is wearing a necklace on top of her hijab, or a brooch, a ring, a bracelet, etc, and it is not attracting the gaze of a non-mahram man, then she can wear it.
A woman might not be intending it to bring notice of a non-mahram, but it would still be considered haram if it is bringing notice, as it would be considered as zeenah.
And Allah knows best.
The main issue here is real repentance and firm decision not to commit that sin again.
Wearing the garments or jewelry does not make a difference as far as the money used in getting these items was lawful money, and wearing it will not encourage falling again in the sinful acts.