These
 are 
guidelines 
on 
how 
to 
knit
 a horizontally ribbed 
tea 
cozy 
with 
a 
handy 
loop 
at 
the 
top.
 The 
alternating 
furrows 
and
 ridges 
make 
for 
extra
 thickness
 and 
insulation.
The instructions are for knitting flat on two needles, and another set is for knitting in the round. It comes with a diagram for visual learners.
You can knit this to the size of your teapot - just measure around the pot and subtract 5-15% for negative ease (the pattern says 5%). Double up on your yarn to make a stiff fabric. I would use wool, for its insulating properties. The sample cozy weights 170 grams.