I typically wear a 1x/2x - most things I choose to wear a 2x though it's a little loose on me, except the bust, because I'm a big-busted woman.  This costume I ordered in a 3x/4x due to the leg avenue sizing charts.  It DOES NOT FIT.  This costume would not zip more than halfway - it wouldn't accommodate anyone with a bust size larger than a 38.  Absolutely ridiculous.  It SAYS 3x/4x, but it FITS more like a large.  This company needs to re-evaluate their sizing, since clearly their idea of what constitutes a 3x/4x is quite skewed. . I can't begin to tell you how disappointed I am. Generally I would be absolutely swimming in a 3x/4x shirt or dress, but this one won't even zip.  Clearly, if you buy this you need to order 2 sizes larger than what you would typically wear.

Other than the fit, the construction seems to be good (though I can't offer a lot of input there other than a first impression, since I have not had a chance to wear it)  but the material is not of the quality I would expect for the price.  The costume (on a hanger) hangs lower in front than in the back; I would wear leggings with it to avoid showing off butt cheeks.  Also, the pettiskirt shown under the dress in the picture does not come with the dress, you have to purchase it separately - so don't expect the dress to look as full as it does in the picture, with the black lacy underside, unless you spend another $20 on the pettiskirt.