Wash the cucumbers thoroughly and slice them into ⅓-inch rounds or spears. Set aside.

In a bowl or jar, mix vinegar, water, sugar, and salt until dissolved. Add red pepper flakes if desired.

Add cucumber slices and smashed garlic to the brine, ensuring they are submerged.

Cover and refrigerate for at least 1 hour, preferably overnight for better flavor.

Taste the pickles and serve as desired.