Is it permissible for a woman to wear a small 'iqal on her wrist, and is it permissible for a man to wear a bracelet shaped like an 'iqal on his wrist, taking into consideration that it involves imitation between the two sexes?

It is forbidden for a man to wear a bracelet in general, whether it is in the form of an 'iqal or otherwise. As for women wearing this bracelet in the form of an 'iqal on the hand, there is no objection to it, because the 'iqal on the hand is not exclusive to men, and it is considered permissible adornment for them.