The needle sizer is oblong and has a 5 inch ruler down one side and 14 cm down the other side

3 in cuffs)

and it automatically rolls up

you can use 4 mm (US 6) knitting needles or a 5 mm (US H-8) crochet hook

hp 1001507 needle sizer 2 10 mm AugustOffers The needle sizer is oblongThis needle sizer is the perfect tool if you want to check the size of your hooks or knitting needles. Measures both metric and US needle and hook sizes from US size 0 (2. 0 mm) up to US size 15 (10 mm). The needle sizer is oblong and has a 5 inch ruler down one side and 14 cm down the other side, which is handy for measuring your stitch count or row count.