40mm watches have been popular choices since the early 20th century and don't appear to be going anywhere soon. The classic look works well with any outfit, whether you're dressed casually or in business attire. At the same time, the variety of available styles makes it easy to find something that complements your personality. With the right accessories and styling, you can wear a 40mm watch with just about anything, from casual attire to suits and tuxedos. 40mm Watches The Rise of Mechanical Watches In 2012, Apple CEO Tim Cook stated that wristwatch sales were growing for men but declining for women. A trend like that could spell doom for smartwatches. By 2022, we may see a rise in the popularity of good-looking mechanical watches among both genders. This is because mechanical watches are easier to repair and are more durable than their electronic counterparts. And while they may be more expensive initially, they're also less costly over time—the cost of replacing ba...