First thing, season. I am totally eyeing off your owl costume for winter, but there's no way I'd buy it now, way too hot

Secondly, I would suggest a more professional looking description. Have a look at my descriptions here

http://www.ebay.com.au/itm/301331156513?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649

http://www.ebay.com.au/itm/301346640385?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649

As you can see I have very little actual item detail in my descriptions, I don't even use measurments, but the descriptions are eyecatching, include terms of sale, etc. And, to be honest, more words just looks more professional, even if the words don't actually say anything new. People can easily see my payment options etc, but by writing them down it helps the description give the appearance of something more professional and thought out. The graphic template is just something I googled, they aren't hard to find. Also, since you're selling new, high priced clothing items I would also include measurments in your case. And what about things like your return policy? Will you ship express if I ask? Add whatever you can think of.