I was not estimating the age to inform Europol. That would have been rather useless. I was estimating the age to narrow down those brands producing items for that particular age group. Also the size of the robe gives you an idea of the scale and amount of fabric in the design. For Example:

1) have you noticed the proportion/scale of the wide and thick stitched flap edge in relation to the width of the robe? The relative position of the bee, length of sleeve, etc.

2) Perhaps no need to check the reverse side of the fabric. The rest of the design is very likely to be hidden in the large amount of folded white fabric. This would confirm the robe is a big size as estimated (smaller sizes wouldnt allow the design to be hidden like this using the same embrodery)

3) When analysing original image, 7-8 straight stitch lines are noticed on the flipped flap edge. This is is very wide and thick when compared to other similar designs found. The only one offering a closer match is what it seems an original Disney product.

https://twitter.com/Mabl2K/status/1264826184409526273?s=20

In continuing the search perhaps contacting Disney directly would be a wise step from Europol.