I know Evy is tall, she is 5 months old and 27 inches long. She's not particularly heavy, she's only 15 lbs. She's wearing 6-9 and 9 month clothes because the others were too short! She has a Britax Chaperone, and it seems like I've moved the straps up a hundred times! I took the cover off to wash yesterday, and she has only 2 spots left to move it up! Now I know that the straps are below the shoulders, so she'll still fit for awhile. But it doesn't seem like she should already have to have the harness that far up