I have a British pattern that calls for No 10 needles.
Since this is a British pattern, should I assume that means US size 3 needles?
It also calls for “D.K.” yarn. I assume that means “Double Knitting” weight.
DK yarn on size 3 needles??? Is that right?
The gauge is supposed to be:
21 sts & 30 Rows = 10 cm
Thank you!
Maybe this will help
http://www.angelyarns.com/yarn/charts.php
That sounds like a mystery to me. No 10 needles in Britain should equal size 3 needles in the US, but that does sound too small to use with a DK and size 10 needles would be too large. The gauge of 21 sts sounds right on for the weight of the yarn. I might suggest that you pick your DK yarn and then use the needle size the yarn recommends and then adjust according to the gauge if needed. -Ve
Thank you, I was hoping it wasn’t just me who thought the needle + yarn size looked odd!
I cast on to a size 7 to knit a gauge swatch and so far it looks like its gonna work out just right, though I am actually using Worsted weight yarn… I don’t have too much selection here in this town when it comes to knitting supplies. :sad:
Your welcome. Where do you live in Arizona that you don’t have much of a selection? Maybe you could open a yarn store! 
Hi,
Here is a chart I use that has American, European, and UK needle sizes.
Knitting Needle Conversion Chart
This says that UK size 10 is a US size 3. That does seem a little small for DK yarn, but I have another chart that outlines yarn weights, general gauges, and recommended needle sizes:
Hope this helps.