I have a 42 inch chest. This shirt is said to be 45 inches smaller. It's snug but it's all good but my neck isn't round and the shirt is very tight around the neck. I need a 16.5 inch collar and this one looks like a 15 inch collar. The sleeves are quite long, almost too long. With a suit, the sleeves must be in order. I am returning this shirt because of the neck size.