Fit perfect, and the onesie underneath can be used with ...
354639
My little Turkeys first thanksgiving outfit. Fit perfect, and the onesie underneath can be used with other outfits. Be prepared for younger babies, as the dress rides up frequently, but it was still super cute!
4665226
This will work great over an outfit.  It is large enough to accommodate the child's existing clothes underneath.  It was a perfect fit for my 12 month old from crotch to shoulder, which makes me think he may outgrow it sooner than expected.  The roominess is in the width.  The only thing is there are no feet in the 12-18 month size, even though the photos show feet.  Maybe it does have feet in certain sizes?  There is a cute flap to cover the hands when desired.  We are using this as a play costume; so the fact that it is large is fine for us.  It is super cute and seems to be quite warm.  Also, this arrived two weeks ahead of the date listed.
4842727
The onesie was super cute and is going to work perfect. Came within the range posted and I'm pleased with the packaging. Maybe a little smaller than I anticipated, but I'll take the blame for that
4621152
These little onesies are sooooo cute and well made. They're soft and sturdy. They can be used for sleep or under clothes during the day as a little T-shirt under skirts,shorts or snap pants. Excellent purchase. Great style.
3009714
I love the fit! My sister is having a onesie birthday party get together coming up soon..and I'm sure this will work!!
2964382
Perfect. They are my favorite onesies! Love them!!
2713376
I was looking for a onesie that said "grandpa" on it that didn't cost too much. Found this one and it's a great buy. I am very pleased with the quality and after several washes it is still great. The shoulder buttons are very helpful when trying to get it over my baby's head. Overall a great little outfit!!
4913748
This was perfect, my son is 10 weeks old and it fit him beautifully, I was able to put a few layers under it so he could stay warm. Super adorable!
890932
These onesies are nice and soft, just the right thickness, and a good fit.  The quality of them is much more than you would expect for the low price you pay.  Buy the little matching pants, and you will have lots of cute outfits.  The 3-6 month size is closer to carters 6 months than 3 months, and just as nice.  My granddaughter weighs about 16 pounds, and they fit well.
4350349
My lo wears cloth diapers. This onesie has a great fit and has room to grow. I love the saying and emerald color. It's been laundered several times and is still holding up well. No flaking or fading.
3400401
Just as described and perfect for kiddos who need easier access to the potty than a full one-piece costume allows for.
1512196
Fit my son, 15.5 lbs 28 inches long. Very cute, not too thick to wear inside or too thin to wear over a long-sleeve onesie outside.
1310854
Super warm and cozy onesie. I wore it to a onesie party and everyone loved it. The tail is the Best part. I'm a 5'7 curvier woman and it fit well even with my bigger thighs and butt. I'd recommend wearing shorts underneath it though since the inside stitching can get itchy.
2351951
these onesies worked out perfect. i had bought them as a gift for a friend who was having twins, and she said they are amazing.
2803997
She looks so cute in this! She's nine months old and th 6-9 month size fits her perfectly. She has only worn the dress a couple of times, but gets a lot of use out of the onesie. Great purchase!
3492427
These onesies are great as an undershirt to add an extra layer of warmth during the winter months. Will purchase again!
3630208
This onesie was as described, good quality. It fit as expected, comparable to other 6month sizing. I have a 2 month old who fits into other 6 month clothes and this fit similarly to the other 6 month clothes he wears. The onesie is nice and soft, I like the quality and it did not shrink or fade when washed.