Religion pleated long sleeve dress

Religion brand, pleated long sleeve dress with blue flower details. V- neck, frilled at the bottom and on the sleeves, studded details on the shoulder and around sleeve Never worn! I bought this on a trip to London because I loved it but I've unfortunately never found an event to wear it to! Size is "S" / Small / UK 8-10 / US 4-6 / 38. I'm usually a size US 4 and this fits me well - it's pretty loose fitting so I would say it would definitely fit a size 6 (and possibly even an 8!)