Aluminium plant markers not only look good, but are rustproof and can be re-used over and over again. With a hole at one end, so you can use them as tags on larger plants, bushes and trees too. Each label is 10cm (4") long and 2cm wide.
100 x aluminium tags
Nutley's 10 cm Aluminium Plant Labels (Pack of 100) - B00IJEQKCG