I just got a pair today. I'm a 12 in most shoes, an 11.5 in Alden Indy boot, an 11 in Chucks. I got the 11.5 D in the Katahdin and they fit great. Maybe a little narrow on the right foot (the bigger of the two) but not bad and should stretch out. They come in a wide width, but I'm afraid that might be too wide. The length is great though. The quality of these boots really impressed me. I just got done returning three different pairs of Alden boots for poor quality. These are much more rustic, but the quality is very high and the leather is quite nice. The fact that you can get a US made, Goodyear welted boot for $150 is rather impressive these days. Just for fun I've decided to add some pics of my new boots after one coat of Obenauf's.