simarro 20 Sheets Number Stickers (Numbers 1-300), Self Adhesive Label Laser Stickers Waterproof Round Number Labels for Office Supplies, Organizing Nail Polish Bottles

These are extremely handy stickers, they can be used for anything that needs to be numbered or differentiated. For me personally, I'm using them on pens that don't have numbers or colour names. This makes it so much easier when I'm swatching them out, just write the number next to the swatch and I'll know which pen it is. With this, it doesn't even matter the number either, as long as all the pens of a certain brand have different numbers it works!Can be used on a whole host of things, you get four sheets of each set of numbers (60 on each)

The number stickers are silvery, so as my photo shows they reflect colour, but also means they stand out, which is ideal for labelling.I intend to use the stickers for a variety of things, from notebooks to collector pocket pages, to small storage boxes and files. It doesn't matter if they run sequentially for me, as long as they individually identify each item.The stickers appear to have good adhesion, and £3.99 is about right for the quantity you get.