It really depends on a few factors. Generally speaking, most men's shirts sizes range from Small to 3XL or 4XL, depending on the label.
Size range is different depending on the brand and fit of the shirt. It is not just a numerical number, but also a label that could be S, M, L, XL, XXL and then 3XL or 4XL.
For example:
- Most brands include extra-large men's sizes up to 4XL.
- Some retailers carry size 5XL or 6XL in some styles.
- Tall sizes exist for men over 6'2" or over 220lbs.
You can find retailers with a variety of sizes available by looking at the size chart on their website. A good way to figure out the right size is to measure your chest, shoulders, and neck, then use that size chart. Here's an example size chart: https://www.haggar.com/en/products/sizing-guides.
In summary, the largest size shirt in men's clothing varies depending on the brand and fit. Most brands offer sizes up to 4XL or taller sizes for those over 6'2" or 220lbs, while some retailers offer size 5XL or 6XL in some styles. To figure out the right size for you, use a size chart and measure your chest, shoulders, and neck.