pencil talk

The name is convoluted – but that is what they are called – “Fiches Bristol”, “Record Cards”, “Fichas Bristol”, “Karteikaten”, “Steekkaarten”, or “Schede Bristol”.
Closer to home, they might be called “index cards” – but where can one find index cards like this?

They are made of superior paper in seven sizes (mm units):
74×105
75×125
100×150
105×148
125×200
148×210
210×297
White, and [...]