This is the way my mother and her mother always made cucumber salad. Very simple to make and keeps for days.
1/2 cup water
1/2 cup white wine vinegar
1/2 cup sugar
1 tsp. salt
Mix together water, vinegar sugar and salt in a saucepan over medium heat. Stir until all of the sugar is dissolved.
Peel and seed the cucumbers. Slice thinly on a mandolin and add to vinegar/sugar mixture. Chill for at least 3 hours before serving.