Dare you order a kilt, made to your measures, online?
I did. And, based on many experiences, I do. Just take care when you take your measures, and preferably double-check them, before you, by pressing “enter”, have ordered a kilt. And even if perhaps not 100% correct, there is always some give and take.
As a matter of fact, only some Scots, Americans, Australians, and Canadians living within a reasonable distance from a kiltmaker, do have the possibility of having their measures taken by a professional. And believe me, it isn’t that difficult, at all.
Follow the instructions, given by the vendor. You might also find advice here:

Kilt Society takes it from the positive angle, 5 good reasons why you should buy a kilt online. They make sense.