I didn't realize IBM called their own cards Hollerith cards. They changed the format to 80x10 with rectangular punches in 1928, naming it the IBM Computer Card

I didn't realize IBM called their own cards Hollerith cards. They changed the format to 80x10 with rectangular punches in 1928, naming it the IBM Computer Card. They modified it to 80x12 in 1930. IBM themselves distinguish between Hollerith's cards and IBM cards, but I suppose they were the same physical size and old names die hard.