Hello sir, thank you for your inquiry. For our Mariner Jacket, we recommend selecting a size XL. Based on your measurements, this will offer the best fit.

We do hope this information is helpful.
Kind regards,
Brooks Brothers

Hello, thank you for your inquiry. If you have a 42" chest, you would do well to select a size Large in our Mariner Jacket. All of our outerwear is crafted to easily fit over bulky layers, so you should find that this size will provide a proper fit. The sleeve length for our size Large is generally around 35" and the neck is between 16" and 16.5". In addition, the waist size typically falls between 38" and 40" in standard American sizing.

We do hope this information is helpful.
Kind regards,
Brooks Brothers

Hello, thank you for your inquiry. Based on your height and the width of your chest, we feel confident in recommending a size Extra Large in our Mariner Jacket. Ideally, this will allow for easy layering over multiple layers and greater mobility, more so than a Large would offer.

We wish you luck with your selection.
Kind regards,
Brooks Brothers

Hello sir, thank you for your inquiry. Based on the measurements you have provided, we think a size Medium in our Mariner Jacket would fit best.

We wish you luck with your selection.
Kind regards,
Brooks Brothers

Hello, thank you for your inquiry. Based on your measurements, we would recommend that you select a size Extra Large in our Mariner Jacket.

We do hope this information is helpful.
Kind regards,
Brooks Brothers