Why this shape skips the roller entirely
An orecchietta is a solid piece of dough with a rough inner face and a smooth outer one. Rolling a sheet and cutting discs would give you a flat, even puck with two smooth sides — the opposite of what the shape is for.
The 12 mm rope is the only measurement that matters. Thinner and the ears are too small to cup sauce; thicker and they stay chalky in the middle at eight minutes.
The rope, and how to roll one that does not taper
Take 120 g of rested dough and roll it under the flat of your hand from the centre outward, moving your hand steadily toward both ends. Most people roll from the middle and stop, which produces a rope that is 14 mm in the centre and 9 mm at the ends.
You want a rope that is 12 mm for at least 40 cm of its length. Cut it into 8 mm beads and keep the beads under a cloth while you form them.
The thumb drag
Hold a bead between thumb and forefinger and drag it across a lightly floured board with the tip of your thumb, pressing at the end of the stroke so the far edge curls up. The ear forms in one movement of about 40 cm.
Turn the ear inside out over your thumb and set it down with the rough side up. The rough face — the drag marks — is what holds sauce. Setting them smooth-side-up gives you a bowl of ear-shaped dough with sauce running around it.
Aim for 90 to 100 orecchiette from 400 g of flour. That works out to roughly one every four seconds once you find the rhythm.
Drying them properly
Twenty-four hours on a cloth-lined tray, rough side up, without turning. The ears harden into a shell that holds its curl, and that curl is the whole point: a dried orecchietta is a small cup.
Turning them halfway flattens the curl on the underside and they dry into oval chips instead. Leave them alone.