Pony Knitting Needle Gauge / Ruler 11mm - 25mm
Got some old needles, but don't know what size they are?
Then get yourself one of these Pony knitting gauges that will tell you all sizes in metric from 11.00 - 25mm and US from 17 - 50.
Also includes 6in / 15cm ruler, 5cm tension square and handy yarn cutter.
Free UK p&p