It was recommended that you buy the size up from the measurement.  I have a 38.75" waist so I ordered a 40" kilt.  It is very big around the waist, and using a belt on it you can feel the extra fabric.
Secondly, the grommets on the buckles are of very poor quality.  One of them tore out on the first time undoing that buckle.
I have yet to wear it to work or out and can only hope that the rest of it is of better quality than the grommets.