Question

از انجایی که کفشی اندازه ی پاهاش نبود ...مجبور بود کفش رو سفارش بده

Answer 1

Since no shoes (would) fit him/her, s/he had to get his/her feet measured to get a well-fitted pair of shoes.

Answer 2

As off-the-peg or ready-made shoes didn't fit him, he had to order a pair of cutomized shoes

Answer 3

He had to order tailor-made shoes ,as none of the ready-made shoes fitted him. / his foot size.