According to your description, and with what we found in your first order, we see that we sent you a size L. But as you said it was too small for you, we wonder whether a size bigger (from size L to XL) will fit you according to your own judge from the size L you tried.
If one size bigger will fit you, then, your second order with XL size may fit you.
Besides, we have size chart for this coat here: http://www.dinodirect.com/mens-overcoats-long-thicken-hooded-zipper.html
If you still worried, we suggest you have double check there.
Any further problems, be free to keep us informed.