Our Training Bindings are one size fits all. We detail the sizing on our bindings product page: https://snowboardaddiction.com/products/training-board-binding. Here you can find out if you can shred barefoot, or with shoes.
If your foot size is over US 11 mens you’re definitely capping out at the higher end of the sizing, you should find that by taking out the back heel cup gel pad, it adds a few cm of space for your feet. Your feet should then be sweet! Unless you’re impacted with your training it shouldn’t matter if there is a little overhang.
See how your feet are after a session with the heel cup out. If you’re having to make more adjustments, try taking the full padded inner rubber out, then wear shoes just in the binding skeleton.
Remove the padding:
Strap in with shoes:
If you are still having issues please reach out to us at Support@snowboardaddiction.com.