Your asset label size and material will be determined by the size, type and use of your assets. Smaller assets like wireless mice may need compact labels whereas a power drill used in construction projects may need larger, more robust and weather resistant label.
We also have extensive documentation that covers label printing best practices and hardware recommendations. Explore these here:
The EZOfficeInventory Print Labels Knowledgebase
How to print on dedicated label printers
Using the Label Designer and third party (Avery) labels
QR code vs. Barcode – Best practices and recommendations