Only English cucumbers for me. I grow them in Summer and buy them in Winter. My jar is big and holds almost 2 quarts.
Use vegetable peeler to remove most of peeling of 3 cucumbers then slice thin into jar. Layer with thin sliced onions. Heat 2/3 cup cider vinegar with 1/3 cup white sugar, salt and black pepper. When sugar is dissolved it’s ready to pour on cucumbers but let it cool down a bit first. Brine won’t cover cucumbers entirely. When brine is added, refrigerate 24 hours then enjoy. Note: the brine gets diluted so it can’t be reused. It’s a good side dish.