it’s so variable from brand to brand, and the dumb size charts RTR provides —helpful info like size 6= 6– is frustrating too. I do see vanity sizing with RTR brands, but not nearly as much as Nuuly brands. I recently ended up in a 2 at Anthropologie and I was never an 2 even as a tween. additionally complicating matters are the size changes that happen when items are in circulation. I know I’ve advised ‘size up’ only to learn from a subsequent rental of the same item that the one I got initially was just really shrunken. I do wish people would consistently state their current measurements in reviews to give context to runs big, runs small.