Pack of 15 nicely sized (10″ X 5/8″ x 0.10″) biodegradable birchwood veneer stakes made right here in Maine. These are my favorite for using in the vegetable garden. They will last about 2 years in the garden, depending on conditions.
When I use them to label garlic they are still very readable when garlic is harvested the following year. In fact, I pull the labels and put them in the boxes of garlic to keep varieties separate. Use a weatherproof garden marker for long lasting readability.
I also have a smaller wooden label, which works well for seedlings. Typically I use the small wooden labels in seedling trays and these large ones when transplanting in the garden.