Peel the English cucumber and slice into 1/4 inch thick slices. If you are using regular cucumbers, you will need to cut the cucumber along it's length and remove the seeds, before cutting into 1/4 inch thick half moon pieces.
Place the cucumber in a small salad bowl. Cut the fresh chives over top.
Whisk together the olive oil, vinegar, sugar, salt and pepper. Pour over the cucumber and lightly toss thoroughly. Let the ingredients meld for 20 minutes before serving.