Buying a Comme Des Garcons Shirt for the first time can be challenging because the brand uses sizing that differs from many American clothing labels. Some collections follow traditional Japanese sizing, while others are designed with relaxed or oversized silhouettes. As a result, choosing your usual size without checking measurements may lead to a fit that feels tighter or looser than expected. Understanding how each collection fits is the best way to make a confident purchase. Instead of relying only on the size printed on the label, comparing measurements with a shirt you already own provides a much more accurate result. This guide explains the complete size chart, compares the different fits available across the collection, and provides practical advice to help US shoppers choose the right Comme Des Garcons Shirt for their personal style.