I don't have any employees yet, but you can bet that if I REQUIRE them to wear uniforms (and I will), I and only I will be paying for them.
I think to require an employee to wear a uniform and then make them pay for it on top of that is ridiculous.
This probably comes from my working for a furniture company for 8 years and having full uniforms supplied free by the company.
I would never pay to wear a uniform for a company and wouldn't expect anyone else to do it fo me either.
Just my opninon.