Knitting mittens on circulars

I love knitting on dpns, but I don’t have the size required. I do with my
Webs interchangeables.

How do I knit a pair of mittens in the round on circulars? I can’t join my cast on.

Thanks for reading,

I don’t think you can knit mittens on circulars–I don’t think any one circular is short enough. The only way is to knit using circulars is to use two circs, or magic loop.