Wash the cucumbers thoroughly and slice them into your preferred shape - spears or coins.
In a saucepan, combine vinegar, water, pickling salt, and sugar. Bring the mixture to a boil, stirring until the salt and sugar dissolve.
Place garlic cloves, dill seed, and black peppercorns, in the bottom of a clean mason jar.
Pack the cucumber slices tightly into the jar, leaving some room at the top for the brine. If using fresh dill, tuck a few springs into the jar as well.
Using a canning funnel, pour the brine over the cucumbers until they are completely submerged.
Seal the jar with a tight-fitting lid and give it a gentle shake to distribute the flavors.
Let the jar cool completely and then pop it in the refrigorator.
Refrigerate the jar for at least 48 hours before enjoying your homemade refrigerator pickles.