Infant Clothing Sizes?
This is my first child, and I’m trying to organize the clothes we have for him according to size. Only I just realized that some of them are just marked “3″ or “6″ or “9″. If something is marked “3″ does that mean it’s 0-3 months, or 3-6? I know it probably depends on who made the clothes, but a lot of the ones that are marked with just one number are Carters brand. I also know from baby-sitting other kids that the month is just a guideline (for example, I sat for a little girl who was 15 months, but wore stuff in the 18 months size) and that the clothes are really based on weight, but… I would like to keep all the clothes together and don’t know if I should put things marked 3 with my other things that are marked 0-3, or if they should be with the rest of my 3-6 stuff? I also realize this may be a dumb question, but like I said before it’s my first! 
I had the same thing happen to me. I had no idea too!! My first child born June 19. I had the size 3 with the 0-3. But I soon learned that they belonged with the 3-6 months. My daughter is now 11 weeks and wearing the 0-3 months still. the size 3 months are too big for her. She currently weighs 11 pounds 14 ounces and is 24 inches (all the 50% percentile)
i never really went accordingly to size different brands run big some run smaller i did it on what fit her at the time there are outfits that fit her that say 12 months and shes 22 months and then there are 18 months clothes that hang off of her but to answer you question it usually goes 0-3 then 3-6 then 6-9 and then 12 the 18 then 24 the 2t 3t 4t
I put the ones marked just 3 with my 0-3 month things. They are smaller than the 3-6 month clothes.
Good luck, and CONGRATS!!
zeros are for infants 0000 is usually newborn than theres 000, 00, 0, 1, 2, 3 etc
So size three (3) isnt for babies. Its for toddlers.
Edit – Oh ok must be different than the clothes im used to, with the few clothes i have that are marked 0-3 month, they fit them much closer to 3 months than when they are born. They should probably be with the 3-6 unless you have a big baby. Maybe put it in that draw but at the top and at 2 months you could pull them out and have a look.