Have you tried Addi’s stitch counting frame yet? Addi has invented a really lovely tool for your handicraft adventures. Not only can you check your knitting gauge in a really easy way with this counting frame, but you can also use it to check the thickness of your knitting needles (needle gauge). Two tools in one. That’s clever!
The needle gauge can measure knitting needles from 2-10 mm.
This is a very simple, good gauge because the inner square of 10cm/4” is the right size and big enough to measure a proper sized knit sample or gauge swatch.