Hey, it's Jennifer here! Hopefully I can answer some of your questions on sizing! Most items run true to size unless stated differently in the item's description.
I am 5'3" tall and weigh about 110lbs. I mostly wear size small, but do wear size Xsmall in some items. In the item description you can see what size I am wearing for that exact item.
Here are my exact measurements:
Please email firstname.lastname@example.org or DM @shop_yenni on Instagram if you have any questions about the sizing of a specific item!