Pony Knitting Needle Gauge/Ruler 2mm - 10mm
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 2.00mm - 10mm, imperial from 14 - 000 and US from 0 - 15.
Also includes 6in / 15cm ruler, 5cm tension square and handy yarn cutter.
Free UK p&p