You can use any kind. The small pickling cucumbers are usually preferred because they are firmer, and doesn’t really have the soft core of the larger cucumbers, so they can stay crunchy for a longer time and they don’t dilute the brine as much on account of less water content. But they are all good, because it is the pickling process that counts.
You can decore the big cucumbers, so you only have the firm flesh left, if you so desire.
You can use any kind. The small pickling cucumbers are usually preferred because they are firmer, and doesn’t really have the soft core of the larger cucumbers, so they can stay crunchy for a longer time and they don’t dilute the brine as much on account of less water content. But they are all good, because it is the pickling process that counts.
You can decore the big cucumbers, so you only have the firm flesh left, if you so desire.