This fit is slightly roomy for me at 2XL. My XL is 46-48 closely fitted 49 in.chest
I chose to size up to 2XL based on size chart describing the garment as XL46-48.
2XL no joke I wont be splitting the seam or pulling button if it shrinks a little more in time and the heavy cotton flannel has been very comfortable all day.
Sale priced nicely fits the quality garment supplied by a USA orign company, thanks Schott