I have run into this recently, but with Davo, purchased a large amount of top load Easy mounts, however the packages for a 26mm stamp are identified as T26 and the strips are 215*30. Initially I ignored the T designation and purchased based on actual size, which was wrong. Perhaps this way is what all manufacturers are doing now.
https://www.davo.nl/en/webshop/4202...25-pcs-.html