The sticky papers we use at our home measure 20x10 cm with a 5 mm hole starting 10 mm from the top - see picture 2.
I designed a small holder for them to be placed inside the pot - as a bonus it gives my plants a piratey feeling, which is also nice.
The Fusion360 File is also included.
Edit 2022-06-16
Added a tweaked version with longer peg/spike to press in the ground
Printing with PLA I had problems with the top and bottoms ends to stick on my WhamBam Plate on the BambuLab X1C, so I added another 3mf with added mouse ears (even thou you could just print them with a brim…)
No supports needed, I left the infill at the standard 15%
The author marked this model as their own original creation.