MEDIUM THICC GIRLIES: Get medium. I’m 165, 5’7 and I got large. It’s a bit loose. There’s only 5 inches difference and if you’re not a true large it will be loose. It is incredibly sturdy tho, super cute, pretty comfy. Tried it with my newborn, 1 year old, and 2 yr old - they loved it. 5 stars.