Lovely fabric and thankfully its a little forgiving as its got give and a bit of stretch,  I am 5 6 and 145 pounds I usually take a medium or size 10  sometimes a 8.  From the reviews I chose a large in this and it is snug.  I think one size up wouldve been perfect but Im OK with it form fitting in the chest.  Definitely order up in size,the fabric is gorgeous and sturdy not at all flimsy or thin.