It is about 50 ft of 1 inch soft tubing.
Not very practical for home use ;D
I say make it not hard and you can save some money. and if you want you can take it and make it a counterflow chill just by getting some more fittings and a garden hose. That is what i plan on doing
I actually went ahead and made an immersion chiller with 25’ of 3/8" copper. I used my hands and a copper bending tool to shape it and then soldered on 3/4" copper garden hose fittings. I used a spigot to run water through it and also threw the kettle in an ice bath as well. It took 16 mins. to cool about 4 gallons of wort (Russian Imperial Stout) to 65 degrees. From what I’ve read so far I think that’s okay. However, I only saved about $15. Given the amount of time and effort it took to bend it without kinking it and the numerous trips to Lowe’s to find just the right stuff, I would just buy one if I had to do it over again 
I did gain valuable experience though and it works! Thanks for all the ideas!
I think 16 minutes from boiling to 65 is pretty good even for 4 gallons. Congratulations! Got any pics? Here’s one of mine… Some chiller porn.
Nice curves euge 
I’ll throw up some pics of my newbie effort! I have to admit though, I was a little embarrassed to post pics because of my gratuitous use of fittings and couplers and whatnot but not so much now! I’ve tried to post pics using various methods and cannot figure it out. I’ve also used pic hosting sites RapidShare, Flickr, et al. and have had no luck! What am I doing wrong?
I also thought about making my own chiller but I think I do not have enough know how in order to do it on my own. So I will buy one but I haven’t found what I was looking for. In order to bypass the time until I have a new one I will check chiller rentals and probably rent one. A friend of mine did this already and he was very satisfied.
I saved about 20 bucks making my own and it took about 1 hours to put it together. 50’ of soft copper, which was one box worth so it was already coiled, and two compression fittings.
Immersion chillers are usually heat sanitized by placing them in boiling wort for the last 15 minutes of the boil. Although soldering could create some crevices, sanitizing this way would definately kill them.
I made mine out of hard copper pipe (think water pipes in your house) so mine’s square with about 25 soldered corners and there’s been absolutely no sanitation issues in over 30 batches. Making a square spiral was sort of challenging but it worked. It’s only about 30 feet total but it cools the wort down well. I put it in the wort for the last 15 mins and it’s been fine.
I would like to see a picture of that if you would/could.