Welcome to Xmarks, Joe.

I would think that you'd want to provide measurements in whatever unit your kiltmaker uses. I think a mission to Mars failed famously for mixing metrics. A kilt is much more important (if only slightly less expensive), so speak to your kiltmaker and decide what's best.

And correct me if I'm wrong, but I always thought that mailing to an APO was like mailing domestically.

Regards,
Rex in Cincinnati