Purchased to store the map sections for the board game Gloomhaven to make it easier to locate the sections we need for each scenario easily. Divider stretches far enough to hold a good amount of materials inside.
The elastic doesn't stretch to close the divider when full but it was nothing that a piece of string to wrap around the "button" wouldn't fix.
Bonus that it's a 2 pack and we now have a spare one for our Frosthaven map sections when that game arrives.