Thanks for the info. I will take measurements when I get home.

I'm pretty sure my crankset is un-branded, and I got it 2nd hand, so I couldn't say for sure what it is. Super low-end. Regardless, I'm going to need a new crankset because the holes have been worn totally round and the arms are really wobbly on the spindle. It's probably because of a mismatch between the crankset and the BB.