Gauge in Swedish Check pattern: 24 stitches and 34 rows

From Knitting with Balls:

History tells us that by the early Victorian era, long dress coats gave way  to waistcoats as Western society became less formal and more forward-thinking.  More recently, the corporate world’s "Casual Fridays" took shape as a way to reward professionals at the end of a long week with a comfortable dress code.  The Casual Fridays Vest, worked up in the very popular Rowan Calmer, features shaping at the front cuffs and a clever combination of twisted knit stitches and purls.