Joby Carter on Instagram: "The 3D rule being put into use once again. A set of 16 rules ranging from 5mm to 20mm available from my website jobycarter.com for only £19:50 plus postage. They have proven very popular for good reason, they are so handy. Not only to lay out accurate block but also to have a set of straight rules at varying sizes at your fingertips is so handy! This is useful when marking out letters when you know all your straight thick strokes are the same width, of course all your