You start with a sweater:
Then, you cut the top off right under the armpits.
Leaving you with:
So now you straighten out the piece as best you can, and move on to deal with the neck.
So to work around the neck, cut your basic snake shape to excluse the open neck.
You round out the head, and narrow the end to a tail.
Sew it all up! (sew the tounge on when you sew up the head)
Before you stuff it, pop on some eyes:
Which, (depending on how tightly knit your sweater is) you can just push through the knit, and pop on the backs.
Stuff, and finish
A Happy lill' snake!!
**Notes for stuffing**
If you are making one to use as a scarf, only lightly stuff the head, and the tail. When it's fully stuffed, it looks more toylike than scarflike!)
So if it isn't a scarf, stuff as you like!
I hope that this is helpfull. Let me know!