Just buy it. It’s worth the price and is actually a good value compared to other wool sleep sacks. I got one gifted to me off my registry and among many other sleep sacks, this one was by far my favorite. I just bought the next size up. I use cloth diapering and my little boy pees a lot so when he pees through his diaper and wool diaper cover and pjs, this wool sleep sack keeps the bed from getting wet. I just air it out during the day and it’s good to go for the next night without washing.
Sizing is true to size. I started out with the 3-6 month size but because it has a snug fit around wrists and neck, my 8lb 7oz baby fit into it pretty early after being born but now that he’s 3 months it fits perfectly. If you want them to sleep in this for naps as well and you have a heavy wetter like me, I’d buy two so you can rotate them throughout the day

Lovely sleeping bag, keeps my baby warm without being bulky. I'm sure it's helping her sleep longer overnight! Super fit, it's snug around her chest and neck where it matters but has plenty of kick room. So good this is the second size I've bought!