These shoes appeared perfect but after a couple of months of my daughter never wanting to wear them, I finally asked why and she said the toe prong hurt.  I looked closely and sure enough the plastic edge of toe prong on both shoes was jagged!  The other side that did not touch toe was nice and smooth.  I put them on (altho too small) and I could feel the discomfort of the jagged/rough plastic edge.  How could this pass inspection?  I wrote Birkenstock and they just said to work it out with seller.  Unfortunately it was too late to return to Amazon.  My bad, but still furious because I can't even donate these sandals. No child will tolerate this.  Maybe a shoe repair can replace prong or maybe I can put black electric tape around to make it smoother?  Ugh!  I paid full price.  So, just a warning to check the toe prong carefully before keeping.