Admittedly this thread is from last year but I'll bite.
When an overseas cosplay seller refers to "uniform cloth" as the fabric used for their costumes, what they mean is a generic poly/cotton blend of low quality that can be used for almost anything in mass produced garment-making. It's not what actual uniforms are made out of, certainly not military or school uniforms.
Founder and President, Madison Area Costuming Society, a chapter of the International Costumer's Guild
Strange Land Costuming - www.strangelandcostumes.com
Director, SF&F Masquerade
- COSTUMECON34 - Madison, Wisconsin - May 6-9, 2016 - www.costumecon34.com