These boots have been great! I've only used them a few times as they are just a tad too small for me. Really great for anyone with a wider foot. There are two numbers on the bottom: 298mm, 255. These would be great for someone with wide feet (like myself). For sizing reference, I'm female, 5'10.5", ~145lbs, usually wear a women's 10.5 US (EU 42.5, men's 8.5ish).
You can read more specifics about this boot here: https://www.rei.com/product/107762/dalbello-boss-ski-boots-mens-20162017