Well, the easiest would be to wear a bra under the costume and stuff it with toilet paper or Kleenex or whatever to make it look full. ... if that doesn't work, and you want a customized look, you could also use paper-mache, which will allow a Horror look or bizarre defects if you like, depending on how you shape the paper... and then paint it afterward to look appropriate. If you want ultra-realistic you could do a plastic mold filled with gel... but that is getting into the really expensive/hard to do side of crafts. :)
Easy: cut lemon/grapefruit in half (depends on size needed) and stuff into a bra. Or use little bags of sand.
You can buy one or rent one from a costume store. If you are feeling really creative, you can make one yourself.
You buy one. It is probably to hard to make one yourself.
You don't get a costume. You can just make one up.
One can find an executioner costume for Halloween online at websites such as Amazon or eBay. One can also make their own executioner costume by following tutorials online at YouTube.
The most popular Halloween costume for medieval times is a knight. You can find out how to make a homemade knight costume here: www.coolest-homemade-costumes.com or buy one here www.buycostumes.com
I believe that you get one from either the Able Sisters or Gracie Grace.
You can look at specialty party stores for a funny Halloween costume. One costume to look for is a clown costume. After all, what couldn't be more joyfully hilarious than a clown?
There are literally dozens of different halloween costumes available for your son. One of the best costumes is actually the costume of a cowboy.
Adult sized elf outfits for Halloween can be purchased from Halloween costume stores during the month of October, but may also be purchased from one of the many online costume stores such as Halloween Express and Halloween Costumes.
One that scares people to death!