My son wears a size 9 wide and these fit perfectly so I would suggest to SIZE UP at least 1/2 a size or more.  There was enough room in the shoe for his thicker socks and toe room!  These are very nice boots.  Not heavy at all, relatively comfortable (considering my son never wore anything but sneakers or snow boots).  My son needed these for a 3 day camping trip he was attending. I wanted something that was thick enough to provide sufficent protection but not heavy like most hiking boots are.  I am very glad I bought this pair after researching and checking many others. These are in the middle as far as pricing goes because some of these "hiking" boots can run very expensive.  Knowing my son, he would just wear these for the 2 day camping trip and never again.  Anyway.... the terrain on the camping trip was very muddy, rocky/stony, wet, just all around sloppy.  You had to trudge through rocks, mud at times, grass, and puddles. It rainned just the 1/2 of the 1st day but the night before it poured so I was glad I bought him these.  It was also cold considering it was June.  These made it through every terrain just beautifully.  He had very good traction for all the different terrains, his feet were comfortable as far as temperature goes too.  He said they weren't very comfortable towards the end of the day but he isn't used to wearing different shoes.  He didn't complain though that these were too heavy for him which is what one of my main concerns was as I knew there would be alot of hiking/walking!  He had NO blisters at all (he usually gets blisters with new shoes) and his socks were completely dry at the end of the day!  These were very affordable and offered quality beyond my expectations considering how affordable they were!  GREAT hiking shoes for a 12 yo!