Is it acceptable for a woman to consider height and appearance alongside character in a potential husband if she finds these traits attractive, or should she lower her gaze out of modesty in such cases?
It is good to see whether you are attracted to someone before marrying them (although attraction tends to be different from just specific features, such as height).
There is nothing wrong with considering height or certain traits of appearance, but sometimes people have a bias about what sorts of features they like or dislike, and this might lead to rejecting someone who you might otherwise be compatible with. So it is good to keep an open mind about what a prospective husband might look like. Someone who looks different from the idea you have in mind could be a pleasant surprise!