French Toast denim colored jumper

This jumper is the cutest thing ever! It is a size 7 but I'm not sure about it fitting true to size or not. It almost seems like it runs a bit small. From topseam to very bottom seam, it is right under 17 in long and has a cinched waist of approximately 10 and 1/2 inches give or take. Has only been worn once so it is in near-perfect shape. It is 100% cotton.