Attachable label for seedlings and pot plants

For my balcony, i grow some tomato seedlings. Because they all look very similar to each other as long as they are small, i would like to label them.
I use plant pots witch i make out of old newspaper. And for this pots i have made this labels.

The video to this project: https://youtu.be/ihZBykvZeqA (german spoken language)

Buy this labels from my onlineshop: https://ewap.ch/produkt/pflanzenschilder/

Materials i used: (affiliate)
Labels: https://www.amazon.de/gp/product/B0006HIQP8/ref