Blocking knitwear is the process of using water or steam to reset your newly knitted pieces. The picture below shows an unblocked left sock and a blocked right sock.

To block, immerse your garment in water and give it a good soak.

Remove and squeeze the water out. Try not to wring the piece. Some people recommended popping it in the washing machine on a spin cycle.

Next to dry. You can place the piece on a towel and arrange it, gently stretching as needed. For small pieces, roll up the towel and put it in a warm place for a few hours. Larger pieces need to dry flat in a warm place.

Voila!