I recently bought a set of Sticky Tab Markers from Semikolon for the first time. These are AWESOME!

The cover which is black board with a colourful spine is very durable which means that you can easily carry the sticky tabs around with you when you are on the go in your bag or pencil case.

Inside the cover  there are 40 page markers / sticky tabs (1.97×0.79 inches) in a range of 12 colours. These are easy to detach and easy to write on. The tabs themselves are also a decent thickness and those that I have been using have been long lasting / durable and have not come off/been bent in the same way other paper tabs have been.

These are a good middle ground between paper tabs and full plastic ones.

You can buy on amazon from a range of suppliers.