Sight-size ia a painting technique where the key idea is that your eye needs to be able to see both the canvas and the subject in one glance, so they both appear the same size. This makes it easier to flick your eyes between the subject and your painting for judging shape, proportions and colours. The artists viewing position is roughly 6 – 12 feet away from the set up, so you step forward to make a mark and then step back to observe your painting again. This results in a more painterly, naturalistic finish.