Baby clothing comes in very standard sizes, but just like adult clothing, every brand has a different opinion on what constitutes a specific size. That's why it's so important to consult a baby clothes size chart and consider your baby's weight when trying to figure out the right baby clothing size to purchase. If you don't you run the risk of your baby wearing clothing that is too tight and uncomfortable for him or her.
Here's a prime example: my daughter was 7lbs 7ozs when she was born and fit pretty well into the 0-3 months sizes that corresponded with her age when she was first born. But, as with all babies, she grew very quickly, her torso getting long while her legs stayed a little shorter. The end result? By 8 weeks old, I needed to purchase 3-6 month clothing so it would fit her little belly that started peeking out all the time.
On the other hand, there are some babies that are just born big. I have a friend that has 3 children; all weighed more than 10lbs at birth. Her kids have never worn a 0-3 month size.
So what's a parent to do? For starters, buy according to weight and length. Most major manufacturers of baby clothing have hangtags which now include both weight and length information. If you’re shopping online, be sure to use the websites sizing chart if they have one available.
You can also buy big, which I highly recommend - unless you're purchasing baby sleepwear. It sounds silly to buy clothes that aren’t going to fit the baby, but they grow so fast that, what might not fit this week, could very well be perfect in a few weeks.
These rules also ring true if you are buying baby clothes as gifts, or if you are registering for your shower.
Remember, babies come in all shapes and sizes; considering your baby’s weight when buying baby clothes is a smart thing to do and can ultimately save you from spending hundreds of dollars on baby clothing that may not fit.