In a small saucepan, combine the vinegar, sugar, salt, turmeric, mustard and celery seeds. Bring to a boil over medium heat and stir to dissolve the sugar and salt.
Place the cucumbers in a glass jar or bowl. Pour the hot liquid over the cucumbers.
Let cool to room temperature. Cover and refrigerate for at least 2 hours before serving.
Store in an airtight container in the refrigerator for up to 1 week.