I wear an 11.5 6E.I used these outdoors for the first time sledding after it snowed today. My feet stayed completely dry and warm, and I had no problem walking up extremely steep snowy hills.The shoes hurt extremely bad the first time I wore them. The sides of the shoe below the ankle dug into my foot when I had them laced to the top. Lacing to the 2nd from top hook is comfortable, but I had to soften up the leather on the sides by repeatedly bending it to be more forgiving.Pros: Very wide if you have wide feet and feel good once worn in. Good tread and traction in snow. Waterproof. Warm.Cons: Substantial break in requires. The tongue and upper lace hooks do not seem to have been designed very well as lacing up fully can cause the tongue to get pressed down and the corners of the leather to dig in below your ankles.I remember when an American made shoe 30 years ago a 4E was as roomy as it gets. I never heard of a 6E. This "6E" barely fits and the tongue doesn't close well.My foot has not changed that much, I believe after time they will become a comfortable nice shoe after the leather breaks in. The quality seems top notch.Since the great Birkenstok low-rise hikers from the early 2000's aren't made anymore (they make a runs-smaller, de-materialized hiker that's really a show shoe), I thought I'd try the Boulder. Biggest disappointment is the tongue, which is way too short to accommodate feet raised in the shoe by orthotics. The laces won't remain over the tongue, and slide over the top edge. You have to short lace the shoe. If you remove both the Drew liners to insert the orthotics, the outrer side of the shoe hits the outside ankle bone. The fit is good from the heel to the ball of the foot, but forward of that the toe box is too wide for me, and the shoe is too long. Lacing it causes the top of the toe box to buckle. I might try the 10 6E in place of the 10.5 later, but for now I'm returning the shoes. There's just no substitute for trying on an unfamiliar shoe in a brick and mortar store. Once you know the right size and width for the model, you can order repeatedly online over the years.Good stuff: it has a wide, flat sole and medial.Sure they are wide, that's what I wanted and expected. They actually fit as they should, and when they say 4E, they MEAN 4E, so don't compensate looking for width by going a size larger or you might be swimming in it. Perfect for those wanting to insert their own orthotics. Truthfully, the most comfortable and properly made shoe there is, or at least I have ever had, and I've had a lot. And you know what, for something to fit that well if you have very wide feet it's just not going to look dainty, so it's not the stylishness you are going for. But they are superior quality and sturdy. Worth the cost, all the way.It's been a few months and I seriously don't think I can go another day with these shoes. They fit wonderfully yet after 2 hours my feet are killing me. The pain from standing and walking slows me down, has me walking slow because of the pain in my heal and arch. I REALLY thought this was going to be a good investment.The only problem is a chemical like smell from the time these came out of the box and it has not dissipated. Has anyone else had this problem? I agree with the long break in time period issue, but they are a true fitSmall issue with the design of the tongue. It is difficult to tuck in, so it puckers . I was expecting more support, but that can be corrected with orthotic inserts. The fit was good.Seams like good quality. I have large custom orthotics and I bought the Drew Aaron Oxford shoes. Great fit and shoe. For the winter I decided to buy the Boulder Low-cut hiking shoe. Same company same size, the Boulder was much bigger and didn't fit. Go figure.