Ellen Lupton on Instagram: "Tips: Em dashes and en dashes —Traditionally, the em dash was as wide as a capital M, and the en dash matched the N. —Today, a standard em dash is the width of the type size. Thus, 12pt type has an em dash that is 12 points wide. (Font designs may vary.) —En dashes are half the width of em dash, and hyphens are half the width of en (but a little thicker). —Em spaces and en spaces are the same width as em and en dashes. —Book designers usually set dashes with no added