Can I use a bigger size needle to knit the vw hat? Say size 10 maybe? also, what do you do with the loop that’s left after you bind off?
If you knit a pattern with a bigger needle, you will get a bigger hat. Sometimes a lot bigger. Do you mean the VW hat? That’s knit on size 7. Knitting it on size 10 will make it enormous unless you decrease the number of stitches you cast on.
This site can help you make a basic hat on any size needle with any size yarn.
For the last loop, cut your yarn about 6 inches long and pull it through that loop.