Question: I have a customer, who, for all his children , ordered davkah a very small shel yad so that the tefillin can sit on the right spot on the arm according to as many opinions as possible. His children are on the shorter side and have smallish arms.
Having said this, I am not so boki in these halachos. The customer is a Litvisher (Brisker I think) and asked me to research if what he is doing is indeed meritorious or OTT (Over The Top).
If someone with a good understanding of these halochos could guide me / him on this , I'd appreciate it.