I knit these for my son - he likes pretty much anything with a Union Jack. I started out researching the proportions to make sure I charted this reasonably accurately. I didn’t write a pattern - but I received several requests for the chart so feel free to download for your personal use.

I don’t know how to knit a Union Jack without an inordinate number of ends (there’s a lot to sew in!!) Knitters be warned that vertical stripes can be tricky too.