I ordered several different t-shirts for my daughter to wear to see our grandson graduate from Navy Basic Training. She loved ALL the shirts, but said the sizes tend to run a bit on the smaller side. She typically wears a ladies Medium, and I ordered her the Large size for all the shirts. She did say that the large was a bit "snug" on her, but she would wear it proudly anyway. Perhaps there was some size chart that I overlooked, in my excitement to purchase something a little different than the usual t-shirts. Just make sure to order perhaps 2 sizes up, as there will probably be some shrinkage after washing and drying.