Prepare the cucumbers: Wash thoroughly, trim ends, and slice into spears, coins, or leave whole.
Make the cinnamon brine: In a saucepan, combine vinegar, water, sugar, salt, and cinnamon sticks. Heat until sugar and salt dissolve. Let cool slightly.
Fill the jars: Place cucumbers into sterilized jars. Add optional spices. Pour brine over cucumbers until fully submerged, leaving a small headspace.
Seal and store: Close jars tightly. For quick pickles, refrigerate 24–48 hours. For shelf-stable pickles, follow proper canning procedures.
Serve: Enjoy as a side dish, snack, or topping for sandwiches, salads, and cheese boards.