What are the limits of a wife's obedience to her husband in household matters that she may consider simple and not requiring his permission?

A wife's obedience to her husband in what he commands, provided it does not involve disobedience to Allah Almighty and does not cause her harm, is the most cautious and absolving course of action for her. The benefit in the matters mentioned by the questioner is clear, and they fall under the category of 'ma'ruf' (good and conventional practices) in which obedience is obligatory. It is not correct to say that household affairs pertain solely to the wife. Her presence in the home does not mean she should independently manage all its affairs without consulting her husband when consultation is needed. Consultation is required at all levels of interests, as Ibn Ashour stated, citing Allah Almighty's words: "If they both desire weaning by mutual consent and consultation, there is no blame upon them."