The Ruling on Passing in Front of the One Praying and the Size of the Sutrah

His other question says: Is passing in front of the faces of the praying people forbidden in all mosques, and does this also happen frequently in the Sacred Mosque? We ask for guidance, may Allah guide you.
Answer: It is not permissible for a Muslim to pass in front of the praying people; because the Prophet (peace and blessings be upon him) said: So it is not permissible for a Muslim to pass in front of his brothers while they are praying. If the imam has not started the prayer, and they are praying voluntary prayers, waiting for the prayer, or after the prayer, he has no right to pass in front of them. Rather, he should take another path where possible, seeking a place to stand with the praying people in a way that he does not pass in front of the one praying who is close to him. However, if he is far from him, that does not harm him, or if there is a sutrah between the one praying and him, then there is no harm in that. Likewise, if the people are in prayer and the prayer has been established, there is no harm in passing in front of the praying people while they are in prayer; because they are covered by the imam; by the imam's sutrah. So it does not harm the one who passes in front of them while they are praying behind the imam. But he should not pass in front of a single praying person, or in front of the imam, nor between him and the sutrah. Rather, he should be far from that, or from behind the sutrah, there is no harm, due to the previous hadith. Yes.
The presenter: Your Eminence! Can we know the distance of a person's qiblah after which a person can pass?
The Shaykh: The scholars differed on this, and the best of what was said in that: If he is farther than three cubits from the foot of the one praying, it does not harm; because if he wanted to turn him back, he would need steps, he would need to advance steps. And the Prophet (peace and blessings be upon him) (when he prayed in the Ka'bah, he made three cubits between him and the wall). So if he is far from the place of the one praying three cubits or more, far from him, that does not harm. But it is better for the one praying to take a sutrah. If a sutrah is available to him, he takes a sutrah, like a pillar, a wall, or a stick he plants, or something similar, if that is available to him, so that he makes it easy for people to pass and does not put them in difficulty. And the one who sees the sutrah has no right to pass between it and the one praying, rather he passes from behind it. The Prophet (peace and blessings be upon him) used to take a sutrah in his travels and in his residence, peace and blessings be upon him. And he said (peace and blessings be upon him): So taking a sutrah is a confirmed sunnah, and approaching it is also a sunnah, but it is not obligatory, rather it is a sunnah. Yes.
The presenter: So: We can say: If a person extends his hand to the one who wants to pass in front of him and does not reach him except with a step, then he is in .....
The Shaykh: This is excused in the most correct of the opinions. Yes.