My baby is on the bigger side so this hats ...
935749
My baby is on the bigger side so this hats fit her perfectly. She was 9lbs and 11oz when she was born so i always struggle with hats and clothes
4030688
The hat would need folded over quite a bit to fit a newborn but its still very cute and I look forward to using it on our photo shoots.
2867286
This is a really good quality hat and is really warm but unfortunately its on the smaller side. Even tho it says 6-12 months it does no fit our 8 months old baby. Maybe for babies with a smaller head this head would fit perfectly.
1379306
Our little one's head is on the small size and she's rapidly outgrowing the hat.  The jacket fits fine - only fastens at the top.  Cute and soft.  Don't order it if your baby has an average or large sized head.
4846275
Great product but my 12 month much have a big head because the 6-18 month hat was small on him
2857147
We used this hat for a trip to Disney! The Pros: It keeps the sun off the baby! It adjusts the band size so it will fit better, longer! It ties so it is harder for the baby to remove and the baby gets to chew on the little ends...which is a positive if your baby is teething because they like having things to chew on!

The Con: The brim on this hat is a little ridiculous. At one point my husband put the baby on his shoulders and the hat (on the baby's head) shaded him well. The brim...is...HUGE. The picture doesn't do it justice.

So...in short: Cute but HUGE hat.
4516945
I got the 6-18 month size and it fit my 11 month old well. We had to tighten the adjuster some so there's room for him to grow, but we also could have made it smaller if needed. He's not too into hats, but for the most part left this one on I think because he could see well out of it. (The brim didn't flop down in front of his face.) A note for any babywearers though - the brim is long enough that it bumped against my chest a lot while walking when I wore him in a carrier on my front. We actually purchased the "solid flap" hat by this same brand which we like less, but worked better for front baby wearing. (No problems while back wearing.)
3707240
It's cute, warm, it could be slightly itchy for the baby, my main concern is that they can't turn their heads without covering their face when wearing this thing.
1691044
My baby is 4 months old and this hat is slightly big for her, but not by a lot. She also has a small head circumference for her age. This seems to be the only cowboy hat on the market for babies 0-12 mths - all others are for toddlers/children and are too big. I like the quality, although the black and white tie around the neck is slightly ugly.
1146464
Dear Sunday Afternoon hat, I love you because you protect my baby's head but I am very mad at you for showing a picture of a hat with mesh.  THIS HAT DOES NOT HAVE MESH. I ordered two from different vendors thinking it was a mistake but neither have mesh. However, I am still going to give it 5 stars because itl protects my baby. The sizing runs a little big. I think most babies could probably wear the 0-6 infant size a few months past 6.  The hat has a little cord you can adjust the size with around the head to make it tighter or looser.
32093
My one and a half year old has a really big head and this hat was still a little deep for him. The adjustable strap fits but when pulled down all the way, it almost covers his eyes.
2251005
Way to long in the top part for a infant/child head.
I brought the infant hat and it was a toddler hat that came instead.
2926666
I bought this hat for my 1 year old who is going to Hawaii in the spring. The hat is a little big, but she is a baby so I'm thinking it will work just fine in a few months.
2245526
This costume is a little loose on my four month old, but it will work. The headband is way too big and might fit a baby closer to 6 months. Very cute for Halloween and/or a trip to Disney.
652225
brim is to big for my toddler but admittedly she is only 20 months. it is not stiff so as it flops down over her eyes.
3060902
Love love these hats! It fits just right for my newborn(my daughter weights 7.6lbs). I just wish they were a little bigger. My daughter will probably only get a couple of wears out of it because it fits just right.
1389005
Nice warm hat but when snapped on bottom there is still a lot of room on the sides for cold air to get in your ears. My son has a bigger head and I'd say that if your child has a very large head you will love this. It washes well.