Review on Luyusbaby Early Walker Wearable Blanket for Kids' Bedding by Justin Spence

I've seen several reviews that medium looks like it was meant for a 4 year old. But my son is about 31 inches tall so I bought the height at 36 which seems to be a medium size and is too small. I can't zip it up like a bag. It's a little hard to tell from the photos but is a little wrinkled after washing and is just under 27 inches long but their own chart says it should be over 30 inches. The size is nowhere on the label. Maybe they just accidentally sent Small? Luckily I sent it back for a refund and am able to get a full refund. I was afraid to switch just like that - who knows what size is coming?