I saw this picture of some crochet baby slippers on Pinterest and it directed me to THIS blog-post where I found THIS tutorial on YouTube.
I followed the tutorial up to the part where she makes the strap and I'm quite happy with the result :))
I have to make some more of these slippers because these are already small for our little princess. Her feet (and everything else ;D) grow so fast :))
I wish you have a sunny autumn day!