Wow, wow, wow, these are a perfect fit for the size 12 that I wear and I ordered. You can wear these right out of the box, just as I did. These boots  EXCEEDED MY HIGH EXPECTATIONS!! Wow what an amazing boot! I bought them because I wanted a slip on vs. laced boot. I have several laced boots I love the fit on and this is the third slip on boot I tried. The first two were loose and/or lousy fitting both to get my foot into and just to try to comfortably wear. Also, I have large calves and these fit great in that area. After trying them on and walking around the house and finding that I absolutely loved them, I put Red Wing Mink oil on them just to add a layer of protection. I then let the mink oil set overnight, put them on in the morning and took off on a weekend getaway and wore them all weekend...seriously, these boots do not need breaking in before wearing them. The mink oil I put on them was really just for added water protection, I didn't need it nor use to loosen up the leather at all...and it only slightly darkened them. I'm getting a knee replacement in 5 weeks so I deal with a lot of knee/leg pain and a great fit/comfortable boot is just an absolute must. I also wanted to get them now to get them broken in before my knee replacement...well check that one off the list cause they're already broken in! My searching and stressing over getting the right pair of boots is over. These are officially my new favorite boots! Thank you Irish Setter for a great fitting pair of slip on boots that also look great!