But, FWIW, offloading cheap tat onto charity shops is not going to work well. It costs them money to put it on a shelf and it probably takes up more space than it is worth. Plus, they very likely can’t sell electrical equipment that has had its cord chopped up and repaired, or at least not without spending more on having it tested than they could sell it for anyway.
Next time, find a friend with small feet who would like to take it off your hands.