Men's Shirt Sizes and Sportswear Brands in September 2025

When you buy a men's shirt size, the standard measurements for chest, neck, and sleeve length that determine fit across brands. Also known as dress shirt sizing, it's not just about numbers—it's about how the shirt sits on your body day after day. Most men in North America wear a Large tee, but that doesn’t mean it’s right for you. A 16-16.5 inch neck and 34/35 inch sleeve are common for dress shirts, but if you’re 6’1" and lean, you might need a 17-inch neck. If you’re 5’8" and muscular, you could need a Medium with a 16.5-inch neck. The problem? Brands don’t all measure the same way. That’s why knowing your actual measurements beats guessing based on height or weight.

And when it comes to sportswear brands, companies that design and sell athletic clothing and footwear for performance and casual use. Also known as activewear labels, it’s easy to assume the most famous names are the best. Nike and Adidas dominate the market, but Lululemon has carved out a serious space for yoga and low-impact movement. The real question isn’t which brand is most popular—it’s which one fits your body type, activity, and budget. A runner needs different support than someone lifting weights or playing weekend basketball. You don’t need the most expensive gear—you need the right gear. That’s why the posts from September 2025 break down how to measure yourself, what to look for in a shirt’s cut, and how to tell if a sportswear brand actually delivers on comfort or just marketing.

These articles aren’t about trends. They’re about fixing the frustration of buying clothes that don’t fit, don’t move with you, or fall apart after a few washes. Whether you’re trying to find your perfect shirt size after years of guessing, or you’re tired of paying premium prices for sportswear that doesn’t perform, the guides here give you real tools. No fluff. No hype. Just clear measurements, honest comparisons, and what actually works.

What you’ll find below are the exact guides from September 2025 that helped thousands of readers stop guessing and start fitting right. From how to measure your chest with a tape measure to why Adidas might be better for wide feet than Nike—this is the stuff that changes how you shop.