Knitting in the round

[to-my-wife.livejournal.com]

Hi guys,

I'm making a stockinette striped scarf and it's my first time knitting in the round. I bought a 40cm (16") circular needle and cast on my stitches, but they come up short.

E.g. in this picture here:



the stitches reach all the way around the needle, whereas on mine there is a huge gap.

This may seem obvious, but does this mean I have the wrong length circular needle? Should I go for a 30cm (12") one?

Although I usually knit with bamboo needles, I'm thinking of splashing out on an Addi Turbo metal circular needle. Would anyone recommend these?

Thanks guys!