Without seeing the strikes. I speculate this:
1--strikes about same size as the capsules--you have some of the older strikes that came out of the older, discontiued type of strike machines.
2--strikes in larger capsules-- you have eather the strikes that came out of the present type of strike machine. Or a strike of a higher $$ value $20 or $40 which came in larger capsules. Even in the older type of strike mmachines.
Look and see if there is a $$$value on the strike. That would be helpful. NOT all of the higher $$$ strikes had a dollar value on them though.
Probally since you got them at a garage sale. They are the older discontinued machine type.
It would help a lot if you could post a scan of several different strikes, in different sizes.
Dan