Metaphys Rin Index Film Stickers - Black - Pack of 25 X 6 Sheets

Here's why I love these:

1) they are by far the most compact and pocketable way to carry sticky index tabs. The usual way either requires specialized holders that are too big/expensive to sell with every set of tabs, or they are the disposable dispensers (like the postit flags). This takes up no more space than that other pencil case staple, the 15cm/6-inch ruler :-) Plus, the backing folds around the tabs to protect them from curling up etc, then slides into a simple flexible plastic sleeve (look at the pics). Neat, tidy, no fuss, no frills.

2) The rounded shape works exactly as advertised. It wasn't the main draw for me like the compactness was, but it's appreciated - the pretty's always nice :-) In the same vein, it's great that they're in gradations of the same color except for one. It does exactly the job it needs to do for color-coding, but without having eleventy six different brights that end up all meshing together and defeating the purpose :-)

A note on price: this might seem a bit steep, especially as the simplicity and neatness of the design can make the product look rather underwhelming when you receive it.
Aside from the fact that this is the kind of thing that shows its quality over time as you get ot use it, it's not that expensive when you consider you get a cool 150 flags, plus a well-designed carrying case.

Only gripe: I would make them a tad stickier. That may be a matter of personal taste though; I use them on heavy, matte paper a lot (it's almost cardstock really), maybe thinner, glossier papers would suffer if these were stickier.