A "small" (S) men's size generally fits someone around 5'3" to 5'8" (158-170cm) in height, with a chest of 91-96cm (36-38"), a waist of 76-84cm (30-32"), and weighing roughly 50-71kg (110-156 lbs), but sizes vary significantly by brand, style (slim/regular), and garment type (shirt, pants, suit), so always check the specific brand's size chart.
“A youth size shirt in Large (14-16) or XL (18-20) might fit a small man perfectly. Also, the sleeve length on boys' shirts tends to be shorter, which may fit better on some.”
A youths xl is equivalent to an adult small/medium. I would go with the larger size so he has room to grow into it.
The US is two sizes smaller. Meaning if you are a 10 in an Australia size you are a 6 in a US size . If you are an 8 in an Aus size you are a 4 in a US size. However, a "small" Aus is the same as a "small" US.
Unisex t-shirts are designed to fit both men and women, typically based on men's sizing charts. This means that a unisex small will generally be larger than a women's small but may fit closer to a men's small.
An XS (Extra Small) size is typically the smallest standard clothing size, often corresponding to a US size 0-2, UK size 4-6, or an Australian size 6, but measurements vary by brand; generally, it's for smaller body frames with bust/chest measurements around 77-89 cm (30-35 inches) and waist sizes around 61-72 cm (24-28 inches) for women. It's best to check the specific brand's size chart for accurate measurements, as XS can differ significantly.
The small (S) size is ideal for those who are slightly thinner. This size is often advised for guys with a chest measurement of 32-34 inches.
Modern boyfriend-style clothes are often designed to look unisex and fit most women. As the trend continues to grow, many brands such as Gap, Forever 21, H&M, and Urban Outfitters, have created boyfriend or men's-inspired fashion targeted at female consumers.
If you are selecting sizes for an older adolescent or a young teenager, be aware that youth large does not correlate to an adult small.
Nike clothing generally runs true to size, but it can vary slightly depending on the style and fit. It's recommended to check Nike size chart for your desired products to get the accurate fit.
In Australia, a women's size Medium (M) generally corresponds to an AU size 10 or 12, depending on the brand, while men's Medium (M) usually fits a chest of around 97cm (38 inches) and waist 32-34 inches, but it's best to check specific brand charts. Always look for a size guide, as sizing can vary significantly between retailers, with some M being a 10 and others a 12.
Men's Shirts
We measure our shirts the traditional way, using collar sizes, so you will see our shirts quoted in inches - 15" (small), 15.5" (medium), 16.5" (large) and 17.5" (extra large).
Australia is the planet's sixth largest country after Russia, Canada, China, the USA, and Brazil. At 7 688 287km2, it accounts for just five percent of the world's land area of 149 450 000 km2, and is the smallest continental land mass.