Navy blue ball gown/ evening dress - size small

I bought this beautiful gown in Valencia, for a charity ball I was hosting. It's one of the most flattering dresses I have ever worn. One shoulder design, with a banded waist and flowing skirt. The skirt has a slit down the leg which isn't noticeable when standing still, but is lovely effect when walking (or dancing!!). There is zip down the side with a hook and eye. The skirt is also fully lined. The pictures don't do it justice, and I'm not very good at describing fashion things, so if you want any further photos or info please just ask!! The dress size is small, but if I am honest I would say it's a 10-12. Fit me perfectly and I always say I'm an 11!! I bought it in July 2025 and it has been worn once. Paid £220 new.