I have loved buying Keen for my kids in the past. These are much narrower than than the Keen sandals I bought in 2016. See photos for comparison of well-worn 2016 Keen Whisper size 1 vs. 2018 new Keen Moxie size 3.
2016 Keen Whisper size 1 is 22.6 cm long and 9.3 cm wide. 2018 Keen Moxie size 3 is 23.5 cm long and 8.6 cm wide.