DarthMel

I am in agreement with Katie and Vanya. "Approximate" is to take into account that there are people of varying sizes, and that they may need a larger or smaller item for it to have the correct look on them. For example, if the patch is even on all sides, it's even on all sides whether the patch is 3" or 12". The ratio between the height and width looks squished as the CRL is written currently. This does not give the look of the movie costumes.
 
You also need to take into account that there are GMLs that will take the measurements listed word-for-word, and will not approve a costume otherwise. I think changing the wording to a ratio, if possible, would be better in this instance.

I think "all sides should be the same length" is acceptable and allows for the patch to be as big or as small as required for the wearer, yet not look visually off by having squished sides etc. 

I certainly know LMOs aren't going to be that picky - there's really no way they could tell the exact difference.
 
It's just the issue that comes up on the vendor-end when we get asked by our potential customers about every little detail, and they want to be sure the patch is the CRL size and you have to explain why your patch is a little different than the crl... And I know there are people making their own costumes out there that think they have to have the exact right measurements or they won't get approved.
 
So I'll be sure to tell my customers that the sizes are approx .... maybe if it just said the patch was Approx 3" tall?  and maybe that it's a perfect hexagon like the logo - because that is a 'right look' issue

^yes, size wise. But, an even-sided shape versus a squished shape is a significant visual difference at any size. (but, that's where researching your build comes in)