gauge - help!

[vlinderkus]

I have a fairly simple, and probably a bit stupid, question about gauge. The pattern I want to knit says that my gauge should be 20 stitches and 32 rows equalling 4 inches. But, while my width (nr of stitches) is about 4 inch/10cm, by length is way longer, around 13cm . I was now wondering what exactly I could do about this? I can't take smaller size needles because then my widt is not 4 inch anymore. I don't want to take other wool.
Is there something else I could do to have a correct gauge swatch?

[suzeeq]

Try a smaller needle, it may affect your rows more than your stitches. And it's better to CO about 30 sts with 5 on each side in an edging and measure the 20 sts in the middle. Also knit several rows before making the 32 rows. The CO and edge sts