Is there a kind of stretchy yarn available out there?

How-to Questions
1

I want to surprise someone with a pair of fingerless gloves that I want to knit myself (hopefully), but I don’t know exactly how big his hands are xD Thanks!

2

There is a woman at my LYS sock class who is using Cascade Fixation for her grandaughter’s socks and it’s very stretchy! Lots of places sell it, here’s one.
http://www.onefineyarn.com/Merchant2/merchant.mvc?Store_Code=OFY&Screen=CTGY&Category_Code=CAS_FIX

3

Knitting something with ribbing will make a big difference, even if just a couple of 2x2 rib columns on each side.

4

There’s also this:
http://www.straw.com/cpy/yarns/Maizy-scans.html

and this:
http://www.littleknits.com/products.php?cat=425

and this:
http://www.redbirdknits.com/yarn/detail.php?Category=Yarn&name=Mega%20Boots%20Stretch

These are all fingering weight, though. I think the stitch you use makes more of a difference in the stretch factor. It’s really best you get an idea of the size of the hand you’re knitting for.

5

Oh, I forgot about Nashua Cilantro which is a worsted weight cotton and polyester yarn. I really like it.