Answered by Shaykh Yusuf Weltch
What is the permissibility regarding a male tailor measuring a woman for a dress?
In the Name of Allah, the Most Merciful and Compassionate
May Allah bless you for your concern and caution in the religion.
After consulting some reputable scholars, it is clear that it is impermissible for a male tailor to measure the body of a woman if doing so entails touching her body or seeing its shape. [Shaykh Hassan al-Hindi; Mufti Manzur Ahmad]
That said, one should refrain from direct measuring. Consider the following alternative options:
1) She can give the tailor a sample garment to copy
2) She can have a woman measure her
3) She can measure herself
4) She can purchase a pre-made garment
Since these options are available, there remains no necessity to allow for direct measuring of the body.
Hope this helps
Allah knows best
[Shaykh] Yusuf Weltch
Checked and Approved by Shaykh Faraz Rabbani