Personally, I've never bought ferret clothes.  I figure they come with their own fur coat.  That's just me though.  There are a lot of people who do enjoy dressing their pet ferrets up for the cuteness factor.  I was given some neat little sweatshirts one time, but the ferrets didn't take to them too well.  It was amusing to watch for a few minutes, but the shirts didn't go back on after we took some photos because I thought they might become ferret toys before too long.

If you do want to buy ferret clothes, you can't exactly to pick them up at most retail stores.  I guess dressing ferrets isn't a big enough market yet for Walmart to consider (at least not where I live).  There are specialty stores willing to fill just about any need though, and ferret clothing is right in the mix.  As I mentioned before, I recommend checking eBay for just about any ferret pet supplies you might be looking for because there is a large variety and the prices are usually pretty good.  Nothing I point you toward has been personally listed by me, so I can't really answer any questions about what is available for sale.  You can ask sellers as many questions as you like though.  My experience has been that eBay sellers are usually very good about responding quickly to questions.

Just checking now, I see that there are quite a lot of ferret clothes for sale including  t-shirts, sweatshirts, harnesses, dresses, vests, sweaters, sweater/hat combos...You get the idea.  Just about everything but shoes, and I might have just missed those since I only was looking at the top of the first page.  Cute stuff if you and your ferret are into that sort of thing.

I want to say that if you are going to buy your ferret clothing, you should consider the comfort of your pet first.  I have never asked a ferret personally about this, but I don't think most ferrets would enjoy wearing a hat for a long period of time.  My personal feeling is that these would be for photo ops and possibly for wearing to special social events and then removing.  If your ferret seems happy in his or her new duds though, go nuts I guess.  Just make sure that you aren't subjecting your ferret to something it doesn't enjoy for extended periods of time  just for the sake of cuteness.  If the ferret is unhappy, it will probably make its feelings known in short order when it starts trying to weasel its way out of the clothing. (pun intended )

If you do like to dress up your ferret, please don't be offended.  I don't dress up my dog either beyond the occasional bandana and tons of people go to the trouble of tying on little dog booties every day.  It's a personal decision for you and your ferret.  If you are looking, I highly recommend seeing what is available on eBay.  They have one of the best selections of ferret clothes that I've run across.  Another reason to check eBay is that you will sometimes find handmade items that you won't find anywhere else.  These items can be pretty interesting and they are definitely unique since they are made by hand by crafty individuals without a retail outlet.
Ferret Clothes for Sale
Below, you will find a few example of ferret clothes and ferret costumes. Click on any of them for more details. At the bottom of the description page, you will find MANY more outfits and clothes (too many to show here).

Marshall Ferret Sweatshirt, Colors Vary	Marshall Ferret Sweater, Colors May Vary
Marshall Ferret Cap, Black Beret	Marshall Ferret Bee Costume
Marshall Ferret Bow Tie Patriotic Tie	Ferret Velour Hoodie

Some people like to dress their pets up.  There are ferret clothes available for a variety of occasions.  I don't know that they actually need the clothing, but they do look cute when they've got on hoodies!  I think that most people put on the ferret clothing for times when their pet might be making public appearances or getting its picture taken.  For obvious reasons, pants aren't usually worn by ferrets.  If you don't understand why, try it once.

There are ferret shirts, sweaters, t-shirts, sweatshirts, hoodies and all sorts of outfits available depending on when you check.  Here you will find some listings of currently available ferret-wear.  If you do decide to dress your ferret up, be sure that it isn't left alone wearing anything that could harm or trap it.  Also, if your ferret seems uncomfortable in the clothing, take the picture and then take the clothes off.

Thanks for stopping by today.  Good luck finding your ferret clothes!