I'm sorry you had a not-so-productive morning!

I have many a day like that!
That confused me too! I have what I consider to be one of the smaller ones sitting here, but the cards measure 2¼ x 4

I used to have a stack of the larger ones from when I worked...but I used them up on recipes I wanted to try before committing to a "good" card.
It actually brings up a question I have. My current Rolodex uses cards that are a weird shape. The top of the card is a bit curved - not straight across - and the corners are rounded. Of course it's a much smaller curve than any of the corner rounders I have would make. I suddenly realized that the cards from the swap aren't likely to be uniform. For those using bought cards, which shape did you buy? For those making their own (which I'm leaning toward) are they just "square"? Or did you do something to the corners?