You can find many sizes on www.wirecare.com

Wire Care has nylon multifilament in a bunch of sizes. Downside is that you have to buy in multiples of 10 ft. It's under Braided Sleeving -> Specialty -> Nylon multifilament.   http://www.wirecare.com/products.asp?prodline=NM

Yeah, I think the mini starquad is good, since it's more flexible. The overall diameter is 4.8 mm for mini, whereas the regular is 6 mm. If you want mini starquad, look at the Mogami W2893 or the Canare L-4E5C. You can use 1/8" techflex or 3/16" nylon multifilament. If you go with the regular...

I think the Canare L-4E6S is probably a bit stiff. Try the L-4E5C or the Mogami 2893. Those are 4.8 mm in total diameter whereas the L-4E6S is 6 mm in diameter. Sound quality wise, they're probably not noticeable.

I believe the Mogami 2893 would be more flexible than the Canare L-4E6S. The 2893 is 24 AWG, while the L-4E6S is 21 AWG.

I see that the sleeve on the Headphile headphones is glittery with gold. What kind of sleeve is that?

Hi, I'm making a custom cable for my Sennheiser HD-650, and I'm using Cardas L-4E6S 21 AWG cable. For the sleeve, I going to use nylon multifilament, but I don't know what size to get. Could anybody help? Also, I've seen a lot of people use techflex that'll show the cable color underneath. If I...