The PCs are battling a bat swarm, and lit a bedroll on fire and are trying to chase the swarm away by floating the burning bedroll at the swarm with mage hand.
The bedroll will take 1d6 fire damage each turn, but I can’t find how many hitpoints a bedroll would have (in this case, sized for a halfling). Let’s assume the bedroll is still rolled up, and not spread out.
Rope/cloth has 2 hp per inch of thickness: I guess it’s kind of a GM call?
Edit: a simple google search gives this choice as one of it’s first results. It has a long and short option. If we take the rolled width of the short bedroll (for a halfling), it’s width is 8 inches. At 2 hp/inch, that gives it 16 hp total. That sounds reasonable enough, I suppose. Depending on the fire damage rolls, that’s at least 3 rounds.