What size diaper is your 4 month old baby in?
My guy was weighed in at 12.7lbs and is in size 2. Curious about your littles! We usually use Huggies - I find rascal and friends seem a lot smaller around the waist than the Huggies.
Also does your little one have blow outs in the car seat even though their diaper fits fine when they aren’t in the seat?
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My daughter is 4 months old and 15.5lbs. She’s in size 2 but I think I’m going to switch her to size 3 soon! I find Huggies are the best as well, I tried pampers and she had lots of blow outs!

4 months old and 19lbs. Just finishing this box of size 3 then will be moving up to 4 🙃

At 4 month checkup my LO was 13lb 5oz and she was wearing size 1s during the day and 2s at night. She’s gonna be 5 months on the 11th and she’s fitting perfectly into 2s right now but we may add 3s at night in a few weeks to get extra back coverage

I have a 4 month old who is also around 13 pounds. He’s also in size 2. I found I liked pampers but they felt awkward around his thighs. I switched to Kirkland brand and I like the fit better but find the diaper itself is really stiff.
I was actually thinking of trying rascal and friends so that’s good to know.

We just turned 5 months and size 4, but we're a big and tall guy coming in at 22.4 lbs

We switched to Millie Moon and they are by far my fave. They sell them at Loblaws and they are actually a bit cheaper than Huggies. They are so soft - she is in a size 2 at nearly 15 lbs but they fit bigger then Huggies. Size 2 is 9-18 lbs I believe. Have not had a single issue with blowouts and we’ve been using them for a couple of months now.

Size 2.

Haven't weighed my 4 month old yet, but we use Huggies and Kirkland brand diapers, currently on size 3.
Blow outs happen randomly, like when we've been in the car for too long or if he has a lot

My 4 month old is ~18lbs and just switched to size 3. Likely could have switched him sooner but wanted to finish up the size 2s we still had left.
people love rascal and friends which I like the bum coverage! I just think the waist is made smaller!

Size 3 diapers and 18lbs at 4 months old. We use the hello bello diapers as we were gifted so many at our shower and got used to them.

Our 4 month old is almost 17lbs now and still in size 2 (Huggies) but we’re planning to move her into size 3 when we finish the box we’re currently using. I didn’t like the Huggies at first - had preferred Pampers, but we went with Huggies because that’s what was at Costco. We’re used to them now and have very few blowouts.

SiZe 2!

5 months size 3 and still lots of room he's about 17lbs but he's a long boy .

My daughter is a few days shy of 6 months old, and we are still in size 1.

4.5 months old 19 lbs 11 oz and we have been in size 4 for a few weeks now