hi like to buy a 14AWG silicone wire. which heatshrink tube does it suits..
also what is the rate of shrinking of tube,( not respect to time), what i mean is how much can we reduce the size of a 6mm heat shrink tube by heating....

I guess 5mm or 4mm should be fine. You can buy shrink tube locally and it is cheap so nothing much to worry about. It costs Rs.6 per metre here.

thank u raj

Most of the locally available heatshrink tubes have a 2:1 ratio. Which means a 6mm tube will shrink down to almost 3mm. I'm not sure if other shrink ratios are available here. But they're very cheap if you buy it in bulk. I bought 10 metres of 5mm shrink tubing for around Rs.50 from SP Road in Bangalore. I say around Rs.50 cause I bought other cables as well and was given discount on pretty much everything.