I looked through all 1,064 of my new-to-me New China Club cards mold chips, and I found that ~3% of the chips were slightly larger, by a small but noticeable amount. I don't have calipers to measure, but you can visually see they are taller when sitting in a rack. Some denoms had none (like the dimes, quarters and 50¢ chips), $5s had less, but nicklels and dollars had the most of these slightly larger chips.
It's not a big deal, but just wondering if this is something others have found with their cards mold chips? As far as I know the set of 1,000 and the 64 chips (8 sample sets) were purchased as part of the same group buy.