A staple of every knitter's tool box, single pointed needles are perfect for flat knitting.
These needles have a tapered point at one end and a stopper on the other, and are turned at the end of each row. They're available in a wide variety of sizes and finishes, and in shorter or longer lengths to suit your preference.
For knitters who like to rest a needle against their body while knitting, single pointed needles are the only option.