Basically useless. They don’t work in my printer and I have a very standard printer. For some reason these are priced great reasonably but you can’t use them and the ones you really need or $22 a box even if you only want 10 labels you have to buy Many many more.
Sturdy lined 3x5 cards I use for notes people and address files daily to-do lists I can take with me... So many uses and so nice all my notes are uniform and stackable. Far superior way to jot notes and save information than using scrap paper and post-it’s. Work well for me.