I want to start off by saying, these boots run true to size after they are heat molded. They are a snug fit. If you want room, you can size up, but your foot will shift once they are heat molded and broken in. All that said, they are great quality especially for the price.
We made the mistake of listening to the other reviews and sized up so we had to send them back. We ended up purchasing the Lashed DB from our local ski shop. They didn’t have my daughter’s size in the Shifty Boa. We would have preferred the Shifty Boa as the ones we purchased are a higher end boot which we thought was more than needed for a beginner snowboarder.