I purchased both the male and female Klingon costumes by Rubies from amazon back in 2010, and from the other reviews on this page, it looks like the costume hasn't changed.  I've reviewed the women's costume, too, and my comments are much the same for both.

The costumes themselves are OK.  These are the "deluxe" costumes because they have quilted accents and the arms of the tunics are black "fur". You will probably want to wear your own black pants, though, and, if you have them, real black boots. You can get relatively cheap fake leather boots on amazon or elsewhere, that will work for many costumes and can be used over and over again and look far far better than the dingbat boot covers they include with the costume. (It takes a little searching; try "men costume boot" - the standard "pirate" or "superhero" boot works for almost any costume. If you try off-Halloween season, you can often find them on sale.)

The big disappointment with both Klingon costumes, though, were the masks.  See the picture on this page, which also appears on the costume packaging. See how long and lush the Klingon hair is?  Well, on neither the men's nor the women's costume does the mask's hair look anything remotely like that.  It is sparse. It is scraggly. It is thin and applied in a single row of patches rather than all over the "head". It barely comes down to your neck, much less past your shoulders. It is so sparse that it doesn't cover your neck or the "view" of where the mask ends on your neck.  It is crap.

I kept both costumes because I made my own modifications. But as the picture is so misleading, it is lucky to get three stars.

Mask modifications:

For one mask, I bought two dark brown 21-inch hair extensions with a drawstring type base (and included clips, which aren't used), link below. Two of these pony-tail extensions are needed for one mask. Using a glass head (which I use to display masks) to keep the mask in a head shape while gluing, I glued these two extensions to the mask, starting way up on the crown just in back of the straggly single row of "hair" the mask comes with. The drawstring for the extension is in a closed circle. Do not cut it, as the doubling up in the center back of the head is needed for full coverage; otherwise you'll have a huge "part" down the back of your head. I had to glue one extenstion at a time, and each extension was glued on in stages, waiting for one stage to dry before starting the next stage.

I used a metal glue, made for models, and it worked perfectly. (Metal glue smells strong, so open some windows). It wasn't hard to do, and with two of the extensions meeting in the center at the back, there is lush full-head coverage.  The smooth hair looks EXACTLY like it does on the costume package.  I am very happy with how it turned out, but, of course, this increased the cost of the costume overall.  And you have to get the costume ahead of time to give yourself time to do this.
<a data-hook="product-link-linked" class="a-link-normal" href="/Dark-Brown-Extra-Long-Ponytail-Hair-Piece-Fashion-Source-HSHP-030/dp/B001EPN3AY/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Dark Brown Extra Long Ponytail Hair Piece Fashion Source HSHP 030</a>

Also, I cut off the nose cover part of the mask. It really looked silly.  For some reason, on both the men's and women's masks, the brown Klingon forehead bumps were highlighted in pale green!  I concealed all the green by going over it with a dark brown felt-tip marker.

Klingon make-up if you have pale skin: Use a water based "professional" makeup. Cover your whole face and neck in a dark purple base, eyelids and all. Go over the dark purple with a dark brown. Line your eyes with a thick black edge. Use make-up or dark lipstick on mouth. Voila'  People who've known me all my life did not recognize me until I spoke.

Happy Reader