I have a similar problem. I am 6'2" and weigh anywhere from 250-280. It doesn't matter what size I order, I have a size 16 foot. I finally found some folks that make a large boot, but my waders are still not big enough to allow for a thick pair of socks. Simms will make a larger bootie for a price, that is what my next pair will be, perhaps they will make a smaller one for you.