Wash the cucumbers thoroughly, trim the ends, and cut them lengthwise into evenly sized spears that will fit inside your jars.
Place garlic slices, fresh dill, peppercorns, and chili flakes into clean glass jars to create a flavorful base.
Arrange the cucumber spears vertically inside the jars, packing them firmly but avoiding excessive pressure that could damage their texture.
Combine vinegar, water, salt, and sugar in a saucepan, then warm gently until the salt and sugar dissolve completely.
Carefully pour the warm brine into each jar, ensuring the cucumbers are completely covered by the liquid.
Let the jars cool at room temperature for several minutes before sealing them and transferring them into the refrigerator.
Allow the pickles to rest for at least one day before eating, although waiting three days creates a stronger garlic and chili flavor.